<http://webisa.webdatacommons.org/13235497>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<bikewalk.org> .
<http://webisa.webdatacommons.org/prov/424880261>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/13235497> .
<http://webisa.webdatacommons.org/prov/263617857>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/13235497> .
<http://webisa.webdatacommons.org/13235497>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/261880776>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/13235497> .
<http://webisa.webdatacommons.org/13235497>	<http://www.w3.org/ns/prov#value>	"PAHs are chemicals released into the air from the burning of coal, diesel, oil and gas, or other organic substances such as tobacco." .