My appointment is at 12  30 , what time should I leave to get there ahead of the scheduled appointment if I take a cab ?
B-SL_DESTINATION_IN_GET_EVENT_SL_ATTENDEE_EVENT B-SL_DESTINATION_IN_GET_EVENT_SL_CATEGORY_EVENT I-SL_DESTINATION_IN_GET_EVENT B-SL_DESTINATION_IN_GET_EVENT_SL_DATE_TIME I-SL_DESTINATION_IN_GET_EVENT_SL_DATE_TIME  I-SL_DESTINATION_IN_GET_EVENT_SL_DATE_TIME O O O O O O O O O O O O O O O O O O B-SL_METHOD_TRAVEL O