About: http://webisa.webdatacommons.org/153841853

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	Preferred examples of X1 and X2 are a chlorine atom, a bromine atom and an iodine atom, of which a chlorine atom and a bromine atom are particularly preferred.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com