{HEAD ~ A composition} 6 containing {TAIL ~ a polycarboxylic acid anhydride} as curing agent 
containing
{ HEAD ~ A composition } 6 containing { TAIL ~ a polycarboxylic acid anhydride } as curing agent
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH