In another embodiment, the seat includes a seat hingeably supported on a base such that, in one version, {HEAD ~ the seat} moves forward to provide {TAIL ~ additional support} when the user sits down 
moves forward to provide
In another embodiment , the seat includes a seat hingeably supported on a base such that , in one version , { HEAD ~ the seat } moves forward to provide { TAIL ~ additional support } when the user sits down
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH