1. A computer implemented method of improving speech recognition, comprising: receiving a speech recognition result from an automatic speech recognition (ASR) engine, the speech recognition result including a plurality of ordered interpretations, wherein each of the ordered interpretations includes a plurality of information items; and analyzing, via at least one processor, the plurality of interpretations using an external knowledge source to create a filtered plurality of ordered interpretations; wherein the external knowledge source includes a position location information, and during the analyzing of the plurality of interpretations, the at least one processor determines if any of the plurality of information items relate to travel requests, and if so, adds the position location information to each information item of the plurality of information items relating to travel.
4. The method of claim 1 , wherein the external knowledge source includes a directory with name data and during the analyzing of the plurality of interpretations, the at least one processor compares at least one information item in the plurality of information items from each of the plurality of interpretations with the name data directory to determine if any invalid name combinations are present in the at least one information item.