Task: Class Definition Understanding (ontology: Earth_Environment/EnvironmentOntology)

Which of the following definitions best describes 'oil well'?

A. Dust which is composed primarily of slicon dioxide.
B. A well which has been drilled in order to extract petroleum oil from subterranean reservoirs and bring it to the surface.
C. A well which provides access to groundwater held in an aquifer.
D. A well which has been drilled in order to extract natrual gas from subterranean reservoirs and bring it to the surface.

Answer: A well which has been drilled in order to extract petroleum oil from subterranean reservoirs and bring it to the surface.