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