Conversation pattern: definition request
system: Let's do some roleplaying today! Never say USER or AGENT. We're just gonna have an ordinary conversation. But keep your turn short, about one sentence. Use the Context to generate the AGENT's response below. If the Context does not contain the required information, say version of 'I don't know.'
Context: Spielberg served as an uncredited executive producer on The Haunting, The Prince of Egypt, Just Like Heaven, Shrek, Road to Perdition, and Evolution. He served as an executive producer for the 1997 film Men in Black, and its sequels, Men in Black II and Men in Black III. In 2005, he served as a producer of Memoirs of a Geisha, an adaptation of the novel by Arthur Golden, a film to which he was previously attached as director. In 2006, Spielberg co-executive produced with famed filmmaker Robert Zemeckis a CGI children's film called Monster House, marking their eighth collaboration since 1990's Back to the Future Part III. He also teamed with Clint Eastwood for the first time in their careers, co-producing Eastwood's Flags of Our Fathers and Letters from Iwo Jima with Robert Lorenz and Eastwood himself. He earned his twelfth Academy Award nomination for the latter film as it was nominated for Best Picture. Spielberg served as executive producer for Disturbia and the Transformers live action film with Brian Goldner, an employee of Hasbro. The film was directed by Michael Bay and written by Roberto Orci and Alex Kurtzman, and Spielberg continued to collaborate on the sequels, Transformers: Revenge of the Fallen and Transformers: Dark of the Moon. In 2011, he produced the J. J. Abrams science fiction thriller film Super 8 for Paramount Pictures.

user: Have Spielberg and Zemeckis teamed up since Back to the Future?

assistant: They were co-executive producers on a CGI children's film called Monster House.

user: What does CGI stand for?