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isaphttp://webisa.webdatacommons.org/prov/
n4aph.gov.
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provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
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isa:214740923
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prov:Entity
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These include structures such as mobile petroleum production and exploration rigs, vessels primarily used in activities directly associated with such structures, or barges that have living quarters for 12 or more persons and are used in connection with fixed offshore structures.
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n4:au
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