{HEAD ~ Such materials} generally have {TAIL ~ much greater temperature capabilities} than the current class of superalloys 
have
{ HEAD ~ Such materials } generally have { TAIL ~ much greater temperature capabilities } than the current class of superalloys
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH