I want to arrive at Sam 's work at 10 ; what time must I leave home ?
O O O O O B-SL_DESTINATION_IN_GET_LOCATION_WORK_SL_CONTACT I-SL_DESTINATION_IN_GET_LOCATION_WORK I-SL_DESTINATION_IN_GET_LOCATION_WORK B-SL_DATE_TIME_ARRIVAL I-SL_DATE_TIME_ARRIVAL O O O O O O B-SL_SOURCE_IN_GET_LOCATION_HOME O