Assertion: laptop's keyboard | /r/HasAspect | number
Facets:
Source sentences:
text: Most keyboards have numbers, letters, symbols, arrow keys, etc., but some also have a numeric keypad, additional functions like volume control, buttons to power down or sleep the device or even a built-in trackball mouse that's intended to provide an easy way to use both the keyboard and the mouse without having to lift your hand off the keyboard.