Graduation is at 5 pm, I want to get there a half an hour early, what time do it need to leave
[IN:GET_ESTIMATED_DEPARTURE [SL:DESTINATION [IN:GET_EVENT [SL:CATEGORY_EVENT Graduation ] is [SL:DATE_TIME at 5 pm ] ] ] , I want to get there a [SL:DATE_TIME_ARRIVAL half an hour early ] , what time do it need to leave ]