Photographic element containing {HEAD ~ a coupler} capable of releasing {TAIL ~ a photographically useful group} through a triazole group 
capable of releasing
Photographic element containing { HEAD ~ a coupler } capable of releasing { TAIL ~ a photographically useful group } through a triazole group
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH