if the concert starts at 5pm, what time should i leave home to get there 30 minutes early
[IN:GET_ESTIMATED_DEPARTURE if [SL:DESTINATION [IN:GET_EVENT [SL:CATEGORY_EVENT the concert ] starts [SL:DATE_TIME at 5 pm ] ] ] , what time should i leave [SL:SOURCE [IN:GET_LOCATION_HOME home ] ] to get there [SL:DATE_TIME_ARRIVAL 30 minutes early ] ]