About: http://webisa.webdatacommons.org/270873398

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	Logical operators can also be supported including AND, OR, NOT, IS NULL, IS NOT NULL. Following is a complete list of key words and symbols supported in one embodiment of the Trim Method: Any string in ??? ??? or ??? ???.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com