Fact-based questions and opinion-based questions are two different types of questions in question answering systems.

  Fact-based questions are those that seek specific information or knowledge about a particular topic. These questions typically have a definitive answer that can be objectively verified. The answers are typically based on factual information, statistics, or evidence. For example, "What is the capital of France?" is a fact-based question with a specific answer - Paris.

  In contrast, opinion-based questions are those that seek subjective opinions or personal viewpoints on a topic. These questions do not have a single correct answer as opinions can vary from person to person. The answers to opinion-based questions are based on personal beliefs, experiences, values, or preferences. For example, "What is the best movie of all time?" is an opinion-based question where different people may have different opinions based on their own tastes and preferences.

  When it comes to question answering, fact-based questions are generally easier to answer as they often have a clear and definite answer that can be found in a reliable source of information. Answering these questions usually involves retrieving and presenting factual information. Opinion-based questions, on the other hand, are more challenging to answer as they involve capturing and representing diverse viewpoints. Answering these questions may require analyzing multiple sources, extracting opinions, and presenting them in a balanced manner.

  In summary, fact-based questions seek objective information with definitive answers, while opinion-based questions seek subjective viewpoints without a single correct answer. Both types of questions require different approaches in question answering systems. Fact-based questions rely on factual information, while opinion-based questions require capturing and representing diverse opinions.