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What happened to Martin Kaymer in 2011?
Entering the 2011 season, Martin Kaymer turned down a chance to become a full PGA Tour member.
What did Martin Kaymer do instead of becoming a full PGA tour member?
Martin Kaymer had gained exempt status with his win in the PGA Championship. He stated he would concentrate on the European Tour for 2011.

Question: Which tournaments did he play in Europe?
Self-contained rewrite: Which tournaments did Martin Kaymer play in Europe?