Assertion: pm | /r/ObjectUse | used as a source of power
Facets:
value: for many gadgets
type: PURPOSE
Source sentences:
text: It can be used as a source of power.
text: Promethium is also capable of generating and absorbing near-limitless amounts of energy, and so can be used as a power source for many gadgets.
text: It can be used as a source of power.