"Which companies were mentioned in the news article?" To answer the question, which technique would you most likely to use?

A. Document frequency
B. Parts of speech
C. Name entity recognition

Correct Answer: C

NER is a process where an algorithm takes a string of text (sentence or paragraph) as input and identifies relevant nouns (people, places, and organizations) that are mentioned in that string.

In Parts of Speech (POS) you label each of the words (often called tokens) of a sentence or many sentences with grammatical descriptions, such as noun, adjective, adverb. These tags identify the composition of the texts.