Remind my son to leave 20 minutes before his job starts.
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED [IN:GET_CONTACT [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION son ] ] ] to [SL:TODO [IN:GET_TODO [SL:TODO leave ] [SL:DATE_TIME 20 minutes before ] [SL:TODO his job starts ] ] ] . ]