Assertion: keyboard's key | /r/HasProperty | single
Facets:
value: with ten keys
type: OTHER
Source sentences:
text: In contrast to the standard keyboard, Braille keyboards have a single key that represents each dot.
text: I have to press shift and the ' key (the single quote mark) to get an @ sign.
text: Each key of the simple keyboard action is a single lever element that pivots on a fulcrum point at the rear.
text: Each key is essentially a shift key so that with ten keys, there are ten single keystrokes and dozens of two and three key combinations.