{HEAD ~ A set} of {TAIL ~ documents} written in the second language are then searched for information responsive to the translated query 
{ HEAD ~ A set } of { TAIL ~ documents } written in the second language are then searched for information responsive to the translated query
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH