Assertion: electric toothbrush's head | /r/CapableOf | rotate in one direction
Facets:
value: quickly
type: MANNER
Source sentences:
text: In addition, the researchers found that oscillating powered brushes (which have small round heads that rotate quickly in one direction and then the other) were slightly better at reducing plaque than sonic powered brushes (which have oval heads that move or vibrate rapidly from side to side).