About: http://webisa.webdatacommons.org/31527150

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??? represents an anion e.g. halide, C7 H7 SO3 ???, alkylsulphate or X??? may be combined with one R3 group e.g. R3 X??? may represent (CH2)3 SO3 ???, (CH2)2)2 COO??? etc.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com