Assertion: lignite | /r/HasProperty | mined in texas
Facets:
value: with approximately 110 million tons
type: OTHER
value: during the 1850s
type: TEMPORAL
Source sentences:
text: Most lignite is mined in North Dakota, Montana, Texas, California, and Louisiana.
text: Lignite was first mined in Texas during the 1850s and was produced primarily from underground mines.
text: Lignites are surface mined, principally in North Dakota and Texas, with approximately 110 million tons mined in 1990.