What is the fine-grained topic of the following text: Felix, runner-up in Athens and Beijing to Jamaica's Veronica Campbell-Brown, overcame a sluggish start to lead coming off the bend and was never going to be caught, the 26-year-old clocking a time of 21.88 to finish 0.21 ahead of 100m champion Shelly-Ann Fraser-Pryce. Only return the topic.
Felix's victory in a track and field event