_:vb915915 _:vb915916 . _:vb915915 "http://www.w3.org/TR/2013/REC-prov-dm-20130430/#term-influence" . _:vb915915 . _:vb915915 . _:vb915915 . _:vb915915 "influencer: an identifier (o1) for an ancestor entity, activity, or agent that the former depends on;" .