Let me know how long it will take me to get to Grand Central Station from my current location.
[IN:GET_ESTIMATED_DURATION Let me know how long it will take me to get to [SL:DESTINATION [IN:GET_LOCATION [SL:POINT_ON_MAP Grand Central Station ] ] ] from [SL:SOURCE [IN:GET_LOCATION [SL:LOCATION_USER my current location ] ] ] . ]