Overview

YAGO2 is a huge semantic knowledge base, derived from Wikipedia, WordNet and GeoNames. Currently, YAGO2 has knowledge of more than 10 million entities (like persons, organizations, cities, etc.) and contains more than 460 million facts about these entities.

Time and location data are treated first-class citizen, the basic triple model is extended by special fields for time and location for querying. Also, we took special care to consistently attach temporal and spatial data to all facts where it is semantically meaningful and where it can be derived from Wikipedia. Unlike many other automatically assembled knowledge bases, YAGO2 has a confirmed accuracy of 95%.

News

• [Jan 12, 2012]
  New YAGO2 relase, adding new relations (e.g. hasGender) among lots of other additions and fixes. View the detailed release notes.
• [Jan 10, 2012]
  OpenLink hosting now fully supports the new yago-knowledge.org namespace.
• [Nov 20, 2011]
  OpenLink is hosting YAGO2 (see here for examples)
• [Aug 1, 2011]
  New domain: yago-knowledge.org
• [Apr 28, 2011]
  Best Demo Award at WWW 2011
• [15 Mar, 2011]
  Updated YAGO2 Release

Publications

• J. Hoffart, F. M. Suchanek, K. Berberich, E. Lewis Kelham, G. de Melo, G. Weikum: YAGO2: Exploring and Querying World Knowledge in Time, Space, Context, and Many Languages. WWW 2011
• J. Hoffart, F. M. Suchanek, K. Berberich, G. Weikum: YAGO2: A Spatially and Temporally Enhanced Knowledge Base from Wikipedia. Technical Report 2010
• F. M. Suchanek, G. Kasneci, G. Weikum: YAGO - A Core of Semantic Knowledge. WWW 2007

All Publications ...

Downloads

• YAGO2 Knowledge Base
• Database Importers
• Utilities for de-/enconding

Demo

Browse through all the facts in the YAGO2 knowledge base, or pose queries using SPOTLX patterns. View the results on a map and timeline.

Browse

Query

Example Queries

• Politicians who are also scientists, born nearby Hamburg, after the year 1900
• Politicians who are also scientists, born nearby Hamburg, after the year 1900, and were connected in some way to the German Democratic Republic (GDR)
• Companies founded in Silicon Valley in the last 3 decades, together with their founders
• Companies founded in Silicon Valley in the last 3 decades, together with their founders (in Chinese)
• Scientists who were born nearby Ulm and won a Nobel Prize (in any discipline)

Further Information

Please find more information in the tabs above. If you have any questions about the project, please send a mail to NameOfTheOntology@mpi-inf.mpg.de.

YAGO2 is part of the YAGO-NAGA project at the Max Planck Institute for Informatics in Saarbrücken/Germany.