{HEAD ~ The containment} of {TAIL ~ the self luminous system} within an envelope which does not pass any radiation prevents the deterioration of nearby organic materials 
of
{ HEAD ~ The containment } of { TAIL ~ the self luminous system } within an envelope which does not pass any radiation prevents the deterioration of nearby organic materials
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH