<http://webisa.webdatacommons.org/prov/883746>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/95832942> .
<http://webisa.webdatacommons.org/95832942>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/95832942>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/95832942>	<http://www.w3.org/ns/prov#value>	"Isobutane is a hydrocarbon, and as compared with air, its specific gravity is about 2 times at ordinary temperature and atmospheric pressure (300K, 2.04)." .