18. The system of claim 17 , wherein the one or more advertisements include a local community guide relevant to the current location associated with the navigation device, and wherein the processor is configured to identify the one or more advertisements having the affinity to the current location by identifying an affinity between the local community guide and the current location.
18. The system of claim 17 , wherein the one or more advertisements include a local community guide relevant to the current location associated with the navigation device, and wherein the processor is configured to identify the one or more advertisements having the affinity to the current location by identifying an affinity between the local community guide and the current location. 19. The system of claim 18 , wherein the processor is further configured to: update the one or more affinities based on one or more peers associated with the user or one or more communities associated with the user; and generate the local community guide based on the one or more updated affinities among the user that spoke the natural language utterance and the one or more peers associated with the user, the one or more communities associated with the user, the current location associated with the navigation device, or the long-term shared knowledge.