About: http://webisa.webdatacommons.org/273984580

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	Z4 represents a nucleophilic leaving group such as a halogen atom or a sulphonyloxy group, for example a chlorine, bromine or iodine atom, the methanesulphonyloxy, p-toluenesulphonyloxy or ethoxysulphonyloxy group, or
http://www.w3.org/ns/prov#wasQuotedFrom	google.com