{HEAD ~ The structure} 10 has {TAIL ~ many uses}, one of which is illustrated in FIG 12 
{ HEAD ~ The structure } 10 has { TAIL ~ many uses } , one of which is illustrated in FIG 12
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH