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