The document 10 is being scanned by the scanner to obtain {TAIL ~ data} corresponding to the indicia 12 existing on {HEAD ~ the document} 
The document 10 is being scanned by the scanner to obtain { TAIL ~ data } corresponding to the indicia 12 existing on { HEAD ~ the document }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD