19. The interactive speech system of claim 17 , wherein said single topic entry is selected based on comparing which of said selected set of phrases in said speech-based query also appear as phrases in said first group of one or more topic entries.
19. The interactive speech system of claim 17 , wherein said single topic entry is selected based on comparing which of said selected set of phrases in said speech-based query also appear as phrases in said first group of one or more topic entries. 20. The interactive speech system of claim 19 , wherein said single topic entry is selected based on determining which of said first group of one or more topic entries has a greatest number of phrases overlapping with said speech-based query.