user: In Frank Herbert's Dune novel, why is the spice valuable?

assistant: The spice is valuable because it is a scarce resource that is crucial to interstellar travel. The spice is scarce because it can be found only on planet Arrakis, and its extraction is difficult due to the presence of sandorms.

user: Based on the passage list the four companies apart from Apple which are part of Big Five American information technology companies. Present the result in a comma separated manner.

assistant: Alphabet, Amazon, Meta, Microsoft

user: According to this text, when did Disney become a public company?

assistant: According to this text, Disney became a publicly listed company on the New York Stock Exchange (NYSE) in 1940 with the ticker symbol DIS.