Assertion: unicycle's seat | /r/CapableOf | maintain particular posture
Facets:
Source sentences:
text: Tilting wheelchairs are preferred for people who use molded or contoured seats, who need to maintain a particular posture, who adversely affected by sheer forces (reclining causes the body to slide slightly every time), or who need to keep a communication device, powered wheelchair controls, or other attached device in the same relative position throughout the day.