Assertion: electric toothbrush's mode | /r/HasProperty | needed
Facets:
Source sentences:
text: what we state above is valid, we can see how having Sensitive mode (a reduced-power, less-effective brushing action) might be needed for frail or debilitated brush users who can't tolerate a full-power setting.
text: Certainly not a mode that is needed, whitening mode is normally just added time as part of the cleaning cycle, which allows for extra attention to be paid to those most noticeable front teeth.