Knowledge Graph數據源主要包括:
- online resources like Wikipedia
- subject-specific resources like Weather Underground for weather information and the World Bank for economic statistics
- publicly available data from Freebase.com, a free and open database of over 24 million things, including movies, books, TV shows, celebrities, locations, companies, and more
- Google search data (used to measure the popularity of a subject and help decide what information people most want to see)