_:vb909366 . _:vb909366 . _:vb909366 . _:vb909366 "IF wasAttributedTo(e2,ag1,aAttr) holds, THEN wasInfluencedBy(e2,ag1) also holds. " . _:vb909366 . _:vb909366 "Attribution is a particular case of trace (see http://www.w3.org/TR/prov-dm/#concept-trace), in the sense that it links an entity to the agent that ascribed it." .