About: http://webisa.webdatacommons.org/37580405

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	Enforcing such patents, however, can be more difficult, especially if the substance is already in use and prescribed for an existing condition.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com