A set of two related pieces of information: a question and its corresponding answer. These pairs are commonly used in various contexts, including natural language processing and machine learning, for tasks like question-answering systems and chatbots. In these applications, a dataset of question and answer pairs is often used to train models to understand and generate human-like responses to questions posed in natural language. The question serves as an input, and the model generates the appropriate answer based on its training data and algorithms.