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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	where R and R' are organic groups selected from alkyl, aryl or equivalent groups, usually lower alkyl, X is halogen, and M is an alkali metal or alkali metal alloy.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com