Remind Mo, Derek and Natalie to starting driving home at 5pm; remind them 15 minutes before.
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED Mo ] , [SL:PERSON_REMINDED Derek ] and [SL:PERSON_REMINDED Natalie ] to [SL:TODO [IN:GET_TODO [SL:TODO starting driving home ] [SL:DATE_TIME at 5 pm ] ] ] ; remind them [SL:DATE_TIME 15 minutes before ] . ]