正解:A
Named Entity Recognition (NER) is a fundamental task in Natural Language Processing (NLP) that involves locating and classifying named entities mentioned in unstructured text into predefined categories such as names, organizations, locations, dates, quantities, percentages, and monetary values. NER serves as a foundational component in various NLP applications, including information extraction, question answering, machine translation, and sentiment analysis.
Reference:
https://encord.com/blog/named-entity-recognition/
https://learn.microsoft.com/en-us/azure/ai-services/language-service/custom-named-entity- recognition/overview