{HEAD ~ The article} comprises {TAIL ~ a proximal end}, distal end and a central section having at least one connection mechanism appointed to receive the interchangeable attachment 
comprises
{ HEAD ~ The article } comprises { TAIL ~ a proximal end } , distal end and a central section having at least one connection mechanism appointed to receive the interchangeable attachment
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH