Assertion: fuel cell | /r/CapableOf | provide energy
Facets:
value: in the future
type: TEMPORAL
value: for very long space missions
type: TEMPORAL
Source sentences:
text: Fuel cells that are large enough to provide energy for very long space missions would require a lot of fuel or an external power source to provide energy to resplit the water back into hydrogen and oxygen.
text: In the future, fuel cells could provide that energy.