when should I leave if I wanted to catch the first lecture on 8  30 am
O O O O O O O O O B-SL_DESTINATION_IN_GET_EVENT B-SL_DESTINATION_IN_GET_EVENT_SL_ORDINAL B-SL_DESTINATION_IN_GET_EVENT_SL_CATEGORY_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 I-SL_DESTINATION_IN_GET_EVENT_SL_DATE_TIME