<http://purl.obolibrary.org/obo/ENVO_01000552> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/07/owl#Class> . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://purl.obolibrary.org/obo/ENVO_01000554> . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://data.bioontology.org/metadata/def/mappingSameURI> <http://purl.obolibrary.org/obo/ENVO_01000552> . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://data.bioontology.org/metadata/def/mappingLoom> "naturalgas" . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://data.bioontology.org/metadata/def/prefLabel> "natural gas" . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://purl.obolibrary.org/obo/IAO_0000115> "Natural gas is a hydrocarbon gas mixture consisting primarily of methane, but commonly includes varying amounts of other higher alkanes and sometimes a usually lesser percentage of carbon dioxide, nitrogen, and/or hydrogen sulfide. Natural gas is a fossil fuel formed when layers of buried plants and gases are exposed to intense heat and pressure over thousands of years." . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://data.bioontology.org/metadata/prefixIRI> "ENVO:01000552" . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://www.w3.org/2000/01/rdf-schema#label> "natural gas"@en . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://purl.obolibrary.org/obo/RO_0000087> <http://purl.obolibrary.org/obo/CHEBI_35230> . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://purl.obolibrary.org/obo/RO_0002473> <http://purl.obolibrary.org/obo/CHEBI_16183> . <http://purl.obolibrary.org/obo/ENVO_01000552> <http://data.bioontology.org/metadata/def/mappingSameURI> <http://purl.obolibrary.org/obo/ENVO_01000552> . <http://purl.obolibrary.org/obo/ENVO_01000555> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://purl.obolibrary.org/obo/ENVO_01000552> .