Our strenuous investigation has been undertaken in {HEAD ~ order} to disolve {TAIL ~ the problems} 
to disolve
Our strenuous investigation has been undertaken in { HEAD ~ order } to disolve { TAIL ~ the problems }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL