Task: Question Answering
Input (English): Passage: In the 1950s, Universal-International resumed their series of Arabian Nights films, many starring Tony Curtis. The studio also had a success with monster and science fiction films produced by William Alland, with many directed by Jack Arnold. Other successes were the melodramas directed by Douglas Sirk and produced by Ross Hunter, although for film critics they were not so well thought of on first release as they have since become. Among Universal-International's stable of stars were Rock Hudson, Tony Curtis, Jeff Chandler, Audie Murphy, and John Gavin. Question: Who directed monster movies for Universal?
Output (English): Jack Arnold