About: http://webisa.webdatacommons.org/154918252

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The step message effectively identifies the fragment and any other messages pertaining to this fragment will always precede the step message in the message stream.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com