You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Who portrayed this American former drug trafficker whose potent form of heroin became reference to Jay-Z's "Blue Magic?"?" whose answer is Denzel Washington.
Each document should contain about 30 words, and these documents should contain useful information.

Query: American Gangster movie cast
Useful Output:

Doc 1: American Gangster (2007) · Watch Now · There are two sides to the American dream. · Overview · Top Billed Cast · Social · A review by Andre Gonzales.
Doc 2: American Gangster Cast: What The Actors Are Up To Now · Denzel Washington (Frank Lucas) · Russell Crowe (Richie Roberts) · Chiwetel Ejiofor (Huey
Doc 3: The movie is directed by Ridley Scott, and is inspired by the criminal career of drug lord Frank Lucas (Denzel Washington), a gangster from La
Doc 4: Armand Assante brought out his dark side playing the role of mafia boss Dominic Cattano in the film. Since American Gangster, the actor's résumé
Doc 5: American Gangster is "a brutal and brilliant film" (Pete Hammond, Maxim). MORE. 17+. COMMON SENSE. Violent, drug-fueled drama isn't for kids. 81%. TOMATOMETER.