Assertion: natural gas | /r/CapableOf | dominate the u.s. fuel mix
Facets:
value: for well over 100 years
type: TEMPORAL
Source sentences:
text: While the Nation's overall energy history is one of significant change as new forms of energy were developed, the three major fossil fuelspetroleum, natural gas, and coal, which together provided an average of 87% of total U.S. primary energy use over the past decadehave dominated the U.S. fuel mix for well over 100 years