Assertion: crude oil | /r/HasProperty | discovered
Facets:
value: during the lease period
type: TEMPORAL
Source sentences:
text: Crude oil became very valuable in the 1850s, when it was discovered that it could be distilled to produce kerosene.
text: If oil or gas is discovered during the lease period, the leaseholder owns it and can produce it.
text: Although fossil fuels like coal have been harvested in one way or another for centuries, crude oil was first discovered and developed during the Industrial Revolution, and its industrial uses were first developed in the 19th century.
text: Crude oil became very valuable in the 1850s, when it was discovered that it could be distilled to produce kerosene.
text: Although fossil fuels like coal have been harvested in one way or another for centuries, crude oil was first discovered and developed during the Industrial Revolution, and its industrial uses were first developed in the 19th century.
text: If oil or gas is discovered, the company is allowed to produce and sell it.
text: Once oil and gas are discovered, petroleum engineers work with geoscientists and other specialists to understand the geologic formation of the rock containing the reservoir.