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: "Are novelists Walter Van Tilburg Clark and Billie Letts both American?" whose answer is yes.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Walter Van Tilburg Clark American novelist
Useful Output:

Doc 1: With the appearance of The Ox-Bow Incident in 1940, Walter Van Tilburg Clark came into immediate prominence as a writer. His novel was acclaimed
Doc 2: Clark's fiction blends elements of the genre western with a careful eye for the local landscape and a spiritual ambivalence toward nature. The
Doc 3: Walter Van Tilburg Clark (August 3, 1909 – November 10, 1971) was an American novelist, short story writer, and educator. He ranks as one of Nevada's most
Doc 4: Among the first to comment on this tradition was the author Walter Van Tilburg Clark. I recently read his novel The Ox-Bow Incident (1940). Set
Doc 5: Walter Van Tilburg Clark (August 3, 1909 - November 10, 1971) was an American novelist, short story writer, and educator.Born in East Orland, Maine, Clark