YAGO

YAGO is a large, organized database that combines information from sources like Wikipedia and WordNet to create a structured map of facts about the world. It catalogs entities such as people, places, and organizations, along with their relationships and attributes. For example, it knows that "Albert Einstein" is a person, "Berlin" is a city, and that Einstein was born in Ulm. YAGO helps computers understand and reason about real-world knowledge, supporting applications like search engines, question-answering systems, and data analysis by providing accurate and interconnected facts.