| http://www.w3.org/ns/prov#value | - He invented the graphic technique called frottage, where he would use a pencil or other drawing tool to make a ???rubbing??? over a textured surface like wood or a leaf, and use the ???rubbings??? as a source of inspiration for images and drawings (Anna tells me the term frottage also means to rub yourself against another person in a sexual way.
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