The system 11, the computer memory further comprising instructions that cause {HEAD ~ the computer system} to learn user preferences by analyzing {TAIL ~ previous user input}, and infer the potential full queries according to said learned user preferences 
The system 11 , the computer memory further comprising instructions that cause { HEAD ~ the computer system } to learn user preferences by analyzing { TAIL ~ previous user input } , and infer the potential full queries according to said learned user preferences
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH