About: http://webisa.webdatacommons.org/148019973

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	wherein R is hydrogen or a halogen atom such as chlorine or bromine, n is a whole number of 1 or 2, M is a metal salt such as an alkali metal, an alkaline earth metal, copper or zinc.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com