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