Assertion: oil company's operation | /r/HasProperty | the exploration
Facets:
value: for gas
type: PURPOSE
value: for oil
type: PURPOSE
Source sentences:
text: Upstream operations are the exploration for oil and gas and the appraisal, development and production of any discovery, and most oil companies do not own equipment for upstream activities; they hire contractors to perform services such as geophysical surveys, well drilling and geological and environmental studies.