Assertion: wheelchair's user | /r/CapableOf | blow into tube
Facets:
Source sentences:
text: If a joystick control isn't appropriate for the user's needs, there are other methods of operating the powerchair, including a head controller, a sip and puff tube, fingertip control or foot control for those with C2-3 spinal cord lesions or head injuries (the user blows into a tube located near the mouth, which controls the movement of the chair).