| http://www.w3.org/ns/prov#value | - Our crude oil and natural gas operations are subject to risks of fire, explosions, blow-outs, pipe failure, abnormally-pressured formations, and environmental hazards such as oil spills, natural gas leaks, ruptures, or discharges of toxic gases, the occurrence of any of which could result in substantial losses due to injury or loss of life, severe damage to, or destruction of property, natural res
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