{HEAD ~ The electroluminescence device} provides {TAIL ~ a great efficiency} of light emission, has a long life and exhibits an excellent chromaticity 
provides
{ HEAD ~ The electroluminescence device } provides { TAIL ~ a great efficiency } of light emission , has a long life and exhibits an excellent chromaticity
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 OTH OTH OTH