In other words, the judgment is made on {HEAD ~ the type} of {TAIL ~ the received document data} in this step 
of
In other words , the judgment is made on { HEAD ~ the type } of { TAIL ~ the received document data } in this step
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH