• Category
  • >NLP

What is Named Entity Recognition (NER) in NLP?

  • Yashoda Gandhi
  • Jan 11, 2022
What is Named Entity Recognition (NER) in NLP? title banner



NLP (Natural Language Processing) is an artificial intelligence discipline (AI). It aids machines in processing and comprehending human language so that they can execute repetitive jobs automatically. Machine translation, summarization, ticket categorization, and word check are just a few examples.


Natural language processing may be used to evaluate massive amounts of text data, such as social media comments, customer service requests, online reviews, news stories, and more, which is one of the key reasons it is so important to organizations.


All of this business data holds a lot of important insights, and natural language processing can swiftly assist firms in identifying those insights. It accomplishes this by assisting robots in understanding human language more quickly, accurately, and consistently than human agents. To understand in detail here is the NLP guide for beginners.


We intuitively recognize identified items such as individuals, values, locations, and so on when we read a text. In the phrase "Mark Zuckerberg is one of the founders of Facebook, a corporation established in the United States," we may differentiate three types of organizations.


However, we must first assist computers in recognizing entities so that they can categorize them. Machine learning’s named entity recognition and Natural Language Processing are used to do this.



Named entity recognition 


The job of detecting and classifying key information (entities) in the text is known as named entity recognition (NER), which is sometimes known as entity chunking, extraction, or identification.


An entity is a word or a set of words that constantly refers to the same thing. Every newly detected entity is categorized into one of many groups. For instance, a NER machine learning model may recognize the term "super.AI" in a text and classify it as a "Company."


NER is a component of information extraction (IE), which is the process of extracting structured data from an unstructured document automatically. The entity in NER is the individual piece of data retrieved.


Need and uses of Named entity recognition


The NER model can detect a variety of items in the text, including people, dates, organizations, and locations. As a result, NER aids in the addition of extra meaning to the text material. In layman's terms, it is a data extraction system. 


There are several used cases for named entity recognition, including the following:


  • Customer support


Every business has customer service processes in place. Every day, they must deal with a large number of client demands ranging from product installation, maintenance, complaints, and troubleshooting. 


NER aids in detecting and comprehending the nature of the customer's request. This also aids the organization in developing an automated system that uses NER to recognize incoming requests and route them to the appropriate support desk.


  • Choosing the best prospects for a job opening by sifting through resumes


Do you believe that the recruitment staff reads all of the resumes that are put in when applying for a certain job role? People only read around 25% of resumes, according to statistics


A computerized mechanism filters out the remainder. They may also have suggested you include just the important abilities that are relevant to the employment opportunity. So, if you weren't aware of this procedure before, attempt to tailor your resume to the job you're looking for.


  • Recognition of entities in electronic healthcare data


NER models may be used to create powerful medical systems that can correctly recognize symptoms in individuals' electronic healthcare data and diagnose their ailment based on those symptoms. 


The NER model can identify the symptoms, illnesses, and substances included in a person's healthcare data.


  • Efficient work algorithm


Let's pretend you're working on an internal search algorithm for a website with millions of articles. If any NLP algorithm has to search all of the terms in millions of articles for each search query, the process will take a long time.


Instead, the search process might be considerably sped up if Named Entity Recognition is done once on all of the articles and the relevant entities (tags) associated with each of those articles are kept separately. 


A search phrase will be matched with only the short set of entities covered in each article using this method, resulting in a speedier search execution.


  • Providing content recommendation


Automating the recommendation system & process is one of the most common applications of Named Entity Recognition. Netflix's success demonstrates how creating an efficient recommendation system may improve a media company's fortunes by making its platforms more interesting and even addicting.


Using Named Entity Recognition to propose comparable items to news publishers is a tried and true method. This is a method that we've successfully employed to produce content suggestions for a customer in the media sector using a content-based recommendation system.


  • Research papers


Separating the papers according to the important entities they include might save time spent sifting through a profusion of information on the issue. 


With the vast quantity of data generated by social media, email, blogs, news, and research publications, extracting, categorizing, and learning from that data becomes increasingly difficult and necessary. 


Other NLP techniques for process discovery exist, but Named Entity Recognition API is the best option when you want your classified data to be well-structured.



Working of Named entity recognition(NER)


Named entity recognition (NER) identifies and locates entities in structured and unstructured texts. 


The semantic element of NLP, which extracts the meaning of words, sentences, and their relationships, relies heavily on NER. The two most prevalent NER approaches will be described in the following sections.


  • NER based on Ontologies


NER formerly depended heavily on a knowledge base. This knowledge base is known as an ontology, which is a collection of data sets containing words, concepts, and their interrelationships. The outcome of NER might be highly broad or topic-specific, depending on the amount of depth of an Ontology.


To gather and organize all of their data, Wikipedia, for example, would require a very high-level Ontology. Due to the intricacy of biological words, a life-science-specific corporation like Innoplexus would require a significantly more extensive ontology. Machine learning is used in ontology-based NER.


It is particularly good at identifying well-known phrases and concepts in unstructured or semi-structured texts, although it is heavily reliant on updates. Otherwise, it will be unable to keep up with the ever-increasing amount of publicly available information.


  • NER Deep Learning


Learning from the Ground Up as it can cluster words, NER is substantially more exact than its predecessor. This is because to a technology known as word embedding, which can recognize the semantic and syntactic relationships between words. Another significant advantage is NER's deep learning feature.


Because it is taught on the way various ideas are used in the written life science language, deep learning may distinguish terminology and concepts not existent in Ontology. It can learn on its own and evaluates both topic-specific and high-level terms. As a result, NER may be used for a wide range of applications in deep learning.


Researchers, for example, can make better use of their time because deep learning handles the majority of the repetitious tasks. They will be able to devote more time to research. 


Several deep learning algorithms for NER are now available. However, due to market competition and recent innovations, determining the finest one on the market is challenging.


Status of Named entity recognition in NLP


The difficulty of detecting and extracting certain categories of entities in the text is known as named entity recognition (NER) in natural language processing. Names of individuals or places, for example. Any concrete "object" with a name, in actuality regardless of the amount of detail.


In machine learning models, named entity recognition, or NER, is widely utilized in NLP applications. Approaches like named entity recognition have been in use for more than a decade in a world where textual information is created every minute throughout the world across disciplines. 


Basic tasks are basic NER models, which provide much-needed data classification and interpretation help. Natural language processing is concerned with the comprehension of a variety of human languages spoken and written, with basic NER models providing much-needed data categorization and interpretation help.


Named entity recognition is concerned with precisely labeled entities in machine learning training data; while performing specialized NLP tasks, POS tagging and syntactic chunking are typically used. 


NER is used on a daily basis by a number of predictive content and content discovery engines on numerous internet platforms for a variety of business sectors.


How is NER applied in NLP


Named entities come in a variety of shapes and sizes. The sorts of data that are processed and subsequently applied might range from simple to complex. Name, Unit, Type, Quantity, Country, Occupation, Ethnicity, and so forth. 


The entity type is determined by the kind of natural language processing need, which includes relation extraction, information extraction, coreference resolution, and question creation, among others.


It's not a new problem to extract useful information from unstructured data. When using this for content discovery and predictive content jobs, ambiguity is a significant difficulty that might cause the recognition process to be diverted. The technique is frequently complicated by multi-token things and names within names.


In such cases, coreference resolution might assist in addressing the problem. To reduce textual ambiguities in the content, coreference resolution detects clusters with linguistic commonalities. 


It is based on content discovery patterns and requires labeled machine learning data as supervised learning tasks. Labeled data quality is equally important in making the underlying named entity system operate.


(Related reading: Syntactic Analysis: an Overview)

Latest Comments