Assertion: sprocket | /r/HasAspect | teeth
Facets:
value: on the exterior
type: LOCATION
value: to engage a perforated band
type: PURPOSE
Source sentences:
text: A gear has teeth to mesh with other gears; a sprocket has teeth to engage a perforated band (such as film), which is very different.
text: A sprocket is a round wheel that has teeth on the exterior.
text: Both sprockets have teeth which slot into the gaps in the motorcycle's drive chain.