Question: What was the nationality of the defending champion at the Men's Singles tournament of the 2013 BWF World Championships?

Related documents: [0]  [DOC] The Men's Singles tournament of the 2013 BWF World Championships was held from August 5–11. Lin Dan was the defending champion. [END] 
[1]  [DOC] Lin Dan (born October 14, 1983) is a Chinese professional badminton player. He is a two-time Olympic champion, five-time World champion, as well as a six-time All England champion. [END]  
Answer: Chinese
Chinese