Under another aspect of the invention, {TAIL ~ the potential full queries} are ranked according to {HEAD ~ their estimated relevance} 
Under another aspect of the invention , { TAIL ~ the potential full queries } are ranked according to { HEAD ~ their estimated relevance }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD