<http://webisa.webdatacommons.org/prov/349946391>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/172164062> .
<http://webisa.webdatacommons.org/prov/326534148>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/172164062> .
<http://webisa.webdatacommons.org/172164062>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/172164062>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gambleroofingservices.com> .
<http://webisa.webdatacommons.org/172164062>	<http://www.w3.org/ns/prov#value>	"They are mainly caused by the expansion of trapped air, water vapor, moisture or other gases." .