Complex sentence: Director Stanley Kramer started her film career with the role of Elsa Lutz in his film "Ship of Fools", whence she continued to establish herself in "Our Man Flint", "Three on a Couch", and "The Valley of Gwangi".
Split into simpler sentences: Director Stanley Kramer started her film career with the role of Elsa Lutz in his film "Ship of Fools". She continued to establish herself in "Our Man Flint", "Three on a Couch", and "The Valley of Gwangi".