Assertion: elevator's button | /r/HasProperty | pressed
Facets:
Source sentences:
text: If the wrong button is pressed, pulling the button or pressing a "stop" button will cancel the call.
text: The environment changes to a new state, which is partially determined by the action (elevators move up or down) and partially unpredictable (buttons are pushed).
text: A button for underground floors is usually marked by negative "-" or B, this button is pressed first followed by the floor number.
text: When the button is pressed, the elevator system will order the elevator which served the specific floor to the floor where that button pressed.