<http://webisa.webdatacommons.org/408507452>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/408507452>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/363819316>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/408507452> .
<http://webisa.webdatacommons.org/prov/40292915>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/408507452> .
<http://webisa.webdatacommons.org/408507452>	<http://www.w3.org/ns/prov#value>	"Such a precursor could be a group of the formula --(CH2)n X, wherein is 0, 1 or 2 and X is a leaving group such as chlorine or bromine." .