4. The method of claim 2 , wherein the act of extracting the intended action further comprises selecting a number of top scoring labels at each semantic stage utilizing confidence scores and at least one rejection criterion.
2. The method of claim 1 , wherein the second level of classification has a plurality of sub-classifications associated with the second level of classification, and wherein extracting the intended action from the decoding of the spoken input using an iterative hierarchical extraction process comprising analyzing the decoding of the spoken input in multiple semantic stages further comprises determining, from among the plurality of sub-classifications associated with the second level of classification, a third level of classification of the intended action from the same decoding of the spoken input during a third semantic stage of the iterative hierarchical extraction process.