{HEAD ~ A toilet seat lifting device} maintains a toilet seat in {TAIL ~ a partially elevated position} when at rest 
{ HEAD ~ A toilet seat lifting device } maintains a toilet seat in { TAIL ~ a partially elevated position } when at rest
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH