document: YAGO2 : exploring and querying world knowledge in time , space , context , and many languages We present YAGO2 , an extension of the YAGO knowledge base with focus on temporal and spatial knowledge . It is automatically built from Wikipedia , GeoNames , and WordNet , and contains nearly 10 million entities and events , as well as 80 million facts representing general world knowledge . An enhanced data representation introduces time and location as first-class citizens . The wealth of spatio-temporal information in YAGO can be explored either graphically or through a special time - and space-aware query language .
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