The Old Man and the Sea is written by Ernest HemingwayErnest Hemingway is a/an AuthorAuthor has example: Émile Durkheim
[Human]: Do you know who wrote The Old Man and the Sea? [Assistant]: The Old Man and the Sea is written by Ernest Hemingway. [Human]: He also wrote To Have and Have Not, right? 
No, he didn't write To Have and Have Not. Actually, John Steinbeck wrote it. Another example of an author is Mark Twain.