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who won the women's singles badminton gold medal in the 2018 commonwealth games
Saina Nehwal won the women's singles badminton gold medal in the 2018 Commonwealth Games in Gold Coast
where did the 2018 commonwealth games take place
The 2018 Commonwealth Games, officially known as the XXI Commonwealth Games were held on the Gold Coast, Queensland, Australia

Question: how many athletes participated in the games
Self-contained rewrite: how many athletes participated in the 2018 commonwealth games