About: http://webisa.webdatacommons.org/175608828

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	Spacer residues may be atoms capable of forming at least two covalent bonds, such as carbon, silicon, oxygen, nitrogen, sulfur, phosphorous, and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr