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Prefix	Namespace IRI
n4	http://purl.obolibrary.org/obo/
obo	http://www.geneontology.org/formats/oboInOwl#
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#
owl	http://www.w3.org/2002/07/owl#
xsdh	http://www.w3.org/2001/XMLSchema#

Subject Item: _:vb1218389
rdf:type: owl:Axiom
obo:hasDbXref: Wikipedia:Hydrothermal_vent
owl:annotatedProperty: n4:IAO_0000115
owl:annotatedSource: n4:ENVO_01000257
owl:annotatedTarget: A hydrothermal vent found on the ocean floor which emits lighter-hued minerals, such as those containing barium, calcium and silicon. These alkaline hydrothermal vents also continuously generate acetyl thioesters, providing both the starting point for more complex organic molecules and the energy needed to produce them.