About: http://webisa.webdatacommons.org/17462277

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	preferably a methylene group. M is hydrogen or an ion from the groups alkali metals, alkaline earth metals, ammonium or substituted ammonium such as mono-, di- or trihydroxyethyl ammonium. It is preferred that M is a sodium ion.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com