Assertion: fuel cell | /r/CapableOf | prove their reliability
Facets:
value: repeatedly
type: TEMPORAL
value: in keeping the lights
type: OTHER
value: recently
type: TEMPORAL
Source sentences:
text: Recently, when several major natural disasters battered the Northeast, fuel cells proved their reliability repeatedly in keeping the lights on for businesses, hospitals, grocery stores and schools, powering emergency shelters for damaged neighborhoods, and saving hundreds of thousands of dollars of potentially lost revenue.