_:vb50857880	<http://www.w3.org/2002/07/owl#unionOf>	_:vb50857879 .
_:vb50857879	<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>	_:vb50857881 .
_:vb50857879	<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>	<http://www.w3.org/ns/prov#Activity> .