About: http://webisa.webdatacommons.org/410323304

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	In the formula VI, X is halogen, such as fluorine, chlorine, bromine and iodine, preferably chlorine, bromine and iodine.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com