Question Answering

Question answering (QA) is a subfield of natural language processing (NLP) focused on building systems that automatically answer questions posed by humans in natural language. These systems utilize a variety of techniques, including information retrieval, knowledge representation, and machine learning to generate accurate responses. QA can be categorized into open-domain systems, which answer questions from any topic, and closed-domain systems, which are limited to specific fields. Common use cases include virtual assistants, customer support chatbots, and educational tools that provide instant answers to user inquiries.