_:vb916555 . _:vb916555 . _:vb916555 "influencer: an identifier (o1) for an ancestor entity, activity, or agent that the former depends on;" . _:vb916555 . _:vb916555 "http://www.w3.org/TR/2013/REC-prov-dm-20130430/#term-influence" . _:vb916555 _:vb916556 .