The implantable device 7, wherein {HEAD ~ the implantable device} is {TAIL ~ a stent} 
is
The implantable device 7 , wherein { HEAD ~ the implantable device } is { TAIL ~ a stent }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL