Sun Yang was chasing gold again Sunday, leading the way into the men's 200m freestyle semi-finals just one day after he gave China it's first men's Olympic swimming title. In a field packed with talent from around the globe, newly-minted 400m freestyle gold medallist Sun topped the qualifying times in 1min 46.24sec, edging American Ryan Lochte in their heat by 21-hundredths of a second
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