<http://webisa.webdatacommons.org/288594606>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/29979552>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/288594606> .
<http://webisa.webdatacommons.org/288594606>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<faqs.org> .
<http://webisa.webdatacommons.org/288594606>	<http://www.w3.org/ns/prov#value>	"X1 is a halogen, such as Cl, Br or I, the other variables R1," .