About: http://webisa.webdatacommons.org/58101104

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	X is a direct bond or a radical selected from the group consisting of ???O???; ???NH???; ???NR???, wherein R is an alkyl or aryl group with less than ten carbons; ???PO3???; ???S???; ???SO???; and ???SO2???;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com