Assertion: fuel cell | /r/CapableOf | use some sort of chemical fuel
Facets:
value: like a combustion engine
type: OTHER
value: as its energy source
type: PURPOSE
Source sentences:
text: Like a combustion engine, a fuel cell uses some sort of chemical fuel as its energy source but, like a battery, the chemical energy is directly converted to electrical energy, without an often messy and relatively inefficient combustion step.