Contextual information derived can be used to improve {HEAD ~ the accuracy} of {TAIL ~ the machine translation} 
of
Contextual information derived can be used to improve { HEAD ~ the accuracy } of { TAIL ~ the machine translation }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL