I want to be at the airport by noon, what time do I need to leave home?
[IN:GET_ESTIMATED_DEPARTURE I want to be at [SL:DESTINATION [IN:GET_LOCATION [SL:CATEGORY_LOCATION the airport ] ] ] [SL:DATE_TIME_ARRIVAL by noon ] , what time do I need to leave [SL:SOURCE [IN:GET_LOCATION_HOME home ] ] ? ]