You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
American_Idol

Context:
The finalists were Cook and Archuleta. David Cook was announced the winner on May 21, 2008, the first rocker to win the show. Both Cook and Archuleta had some success as recording artists with both selling over a million albums in the U.S.

Question:
Who won season seven of American Idol?

David Cook