{HEAD ~ The system} applies {TAIL ~ the transformed inexact query output} to a heterogeneous datastore to provide an output query result 
applies
{ HEAD ~ The system } applies { TAIL ~ the transformed inexact query output } to a heterogeneous datastore to provide an output query result
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH