Complex sentence: Filmmaker George A. Romero was brought in with a vision of a zombie-style horror movie similar to "Night of the Living Dead", but this was considered too scary by Jacks and the studio, who wanted a more accessible picture.
Split into simpler sentences: Filmmaker George A. Romero was brought in with a vision of a zombie-style horror movie similar to "Night of the Living Dead". Romero's script was considered too scary by Jacks and the studio, who wanted a more accessible picture.