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DBpedia
DBpedia.org is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to ask sophisticated... -
Freebase
Description "Freebase is an open database of the world?s information. It is built by the community and for the community?free for anyone to query, contribute to, built... -
OpenCyc
About Now it is even easier to use the rich and diverse collection of real-world concepts in OpenCyc to bring meaning to your semantic web applications! The full OpenCyc...
