About: http://webisa.webdatacommons.org/111410143

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 addition, it is desirable that Ar1 and Ar3 each be one or more kinds of linking unit selected independently from the group consisting of linking units represented by Chemical Formula 6 and Chemical Formula 7.
http://www.w3.org/ns/prov#wasQuotedFrom	google.de