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 had more pseudonyms, Robert Ludlum or Clement Greenberg?" whose answer is Robert Ludlum.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Robert Ludlum pseudonyms
Useful Output:

Doc 1: (Robert Ludlum wrote Trevayne, which was originally published under the pseudonym Jonathan Ryder). Robert Ludlum wrote 27 separate novels over
Doc 2: Description. Jonathan Ryder [pseudonym of Robert Ludlum]. Trevayne. New York: Delacorte Press, [1973]. First Edition. Octavo.
Doc 3: Ludlum also published books under the pseudonyms Jonathan Ryder and Michael Shepherd. Some of Ludlum's novels have been made into films and mini
Doc 4: Robert Ludlum was a U.S. author of spy thrillers. He worked in the theatre as an actor and a successful producer and acted for television
Doc 5: The two best of this genre, imo, were John Le Carre and Frederick Forsyth (particularly his earlier works in the late 60s - 70s).