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