About: http://webisa.webdatacommons.org/30044916

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	Halogens B, Z1, Z2 and Z3 in the formulae (2) and (4) can each be fluorine or bromine or in particular chlorine.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca