Otherwise, the system applies {HEAD ~ additional candidate transformation rules} to {TAIL ~ the selected query element} to generate the transformed inexact query output 
to
Otherwise , the system applies { HEAD ~ additional candidate transformation rules } to { TAIL ~ the selected query element } to generate the transformed inexact query output
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH