Assertion: gas | /r/CapableOf | cease to be significant energy source
Facets:
value: by 2002
type: TEMPORAL
Source sentences:
text: In 1952, Dr. Edward Steidle, Dean of the School of Mineral Industries at Pennsylvania State College, predicted that gas production would soon decline significantly from 1952 rates, so that gas would cease to be a significant energy source by 2002, and possibly as early as 1975.