About: http://webisa.webdatacommons.org/64328342

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	M is an element selected from the group consisting of zinc, cadmium, mercury, aluminum, gallium, indium, tin, silicon, germanium, lead, arsenic and antimony; R is an alkyl group; and x is some integer value equal to the valence of M. 42.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca