About: http://webisa.webdatacommons.org/418294399

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 chain extenders are aliphatic diols having a molecular weight below 250, and from 2 to 15 carbon atoms, such as ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol and cyclohexanedimethanol.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es