Remind mom and dad to leave at 5, alert them 15 mins before.
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED [IN:GET_CONTACT [SL:TYPE_RELATION mom ] ] ] and [SL:PERSON_REMINDED [IN:GET_CONTACT [SL:TYPE_RELATION dad ] ] ] to [SL:TODO [IN:GET_TODO [SL:TODO leave ] [SL:DATE_TIME at 5 ] ] ] , alert them [SL:DATE_TIME 15 mins before ] . ]