Briefly, the invention is in {HEAD ~ the field} of decomposing {TAIL ~ halogenated organic compounds} 
of decomposing
Briefly , the invention is in { HEAD ~ the field } of decomposing { TAIL ~ halogenated organic compounds }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL