About: http://webisa.webdatacommons.org/137194574

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	In the paper, we develop three types of contracts and conduct a detailed comparison among the three contract models.
http://www.w3.org/ns/prov#wasQuotedFrom	researchgate.net