Instruct: Classify Amazon reviews into positive or negative sentiment
Query: "You know our form?"

One of the things I liked about the movie _Alien_ that its sequels didn't have was a sense of claustrophobia -- the hero couldn't just run away. It was stand up and defend yourself or be eaten. This episode of _Doctor Who,_ a perennial favorite of me and all my friends, is able to boast superiority even to that classic movie.