Pasted

select distinct p.firstname, lastname from person p 
where p.gender = 'F' and 
    (select count(*) from filmparticipation fp where
    fp.personid = p.personid and fp.parttype = 'director') > 5 and
exists 
    (select * from person p2, filmparticipation fp, filmparticipation fp2 where 
    fp.personid = p.personid and fp.parttype = 'director' and
    fp2.personid = fp2.personid and fp2.parttype = 'cast' and
    not exists
        (select * from filmitem f where
        f.filmid = fp.filmid and f.filmid != fp2.filmid));