{HEAD ~ An air vehicle propulsion system} incorporates {TAIL ~ an engine core} with a power shaft to drive an outer blade row 
incorporates
{ HEAD ~ An air vehicle propulsion system } incorporates { TAIL ~ an engine core } with a power shaft to drive an outer blade row
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 OTH OTH