Assertion: light bulb's filament | /r/HasProperty | produced
Facets:
value: cheaply
type: DEGREE
Source sentences:
text: The development of the tungsten filaments is considered the greatest advancement in light bulb technology because these filaments could be produced cheaply and last longer than any of the previous materials.
text: The development of the tungsten filaments is considered the greatest advancement in light bulb technology because these filaments could be produced cheaply and last longer than any of the previous materials.