About: http://webisa.webdatacommons.org/148003287

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 and n are the same as defined above and X is halogen such as fluorine, chlorine, bromine and iodine, with Na2 O2 in water and extracting the product with a suitable solvent.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com