About: http://webisa.webdatacommons.org/429992280

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	Preferred, however, are spacers such as 1,4???-biphenyl, 1,2-ethylene, 1,3-propylene, PEG-(2-10), ??, ??-siloxanylene or 1,4-phenylene as well as ??, ??-1,4-bisethylenebenzene.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com