Motori di ricerca semantici

Lista e link dei motori di ricerca semantici :

http://cluuz.com/

https://www.deepdyve.com/

http://www.freebase.com/

http://www.hakia.com/

http://medline.cognition.com/

http://sensebot.com/

http://swoogle.umbc.edu/

http://wikipedia.cognition.com/

http://www.wolframalpha.com/

http://yoodeal.it/