<http://webisa.webdatacommons.org/257123010>	<http://www.w3.org/ns/prov#value>	"In some examples, ???X??? may refer to heteroatoms, such as oxygen, sulfur or nitrogen." .
<http://webisa.webdatacommons.org/257123010>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/471569385>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/257123010> .
<http://webisa.webdatacommons.org/prov/63295943>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/257123010> .
<http://webisa.webdatacommons.org/257123010>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freshpatents.com> .