Biography
Gravitation is the name of more than one artist:
1) an alias of Rubén Moreno Abanades, a Spanish makina and hardcore producer
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2) a short-lived rap group that consisted of B Wiz, Duganski, Ragedy Man, Ab-Style and Chino XL.
It may also be an incorrect name for a soundtrack by 浅倉大介 and others. If so then please fix your tags.
Biography text from Last.fm, available under CC BY-SA.