Complex sentence: In September 2001, Studio Ghibli announced the production of two films, the first would become "The Cat Returns" and the second was an adaptation of Diana Wynne Jones novel, "Howl's Moving Castle".
Split into simpler sentences: In September 2001, Studio Ghibli announced the production of two films. The first would become "The Cat Returns" and the second was an adaptation of Diana Wynne Jones'novel, "Howl's Moving Castle".