I don't want to miss the train at 10 am; can you remind me 30 minutes before?
[IN:CREATE_REMINDER I don't want to miss [SL:TODO [IN:GET_TODO [SL:TODO the train ] [SL:DATE_TIME at 10 am ] ] ] ; can you remind [SL:PERSON_REMINDED me ] [SL:DATE_TIME 30 minutes before ] ? ]