1999 US Open – Mixed Doubles
{'<entity_0>': '1999 US Open – Mixed Doubles', '<entity_1>': 'Mahesh Bhupathi', '<entity_2>': 'mixed doubles', '<entity_3>': 'Ai Sugiyama'}
[['1999 US Open – Mixed Doubles', 'competition class', 'mixed doubles'], ['1999 US Open – Mixed Doubles', 'winner', 'Ai Sugiyama'], ['Ai Sugiyama', 'together with', 'Mahesh Bhupathi'], ['1999 US Open – Mixed Doubles', 'description', '1999 US Open – Mixed Doubles']]
The <entity_0> was the <entity_2> event of the hundred-and-ninth edition of the US Open, the fourth and last Grand Slam of the year. <entity_3> and <entity_1> won in the final against unseeded Americans Kimberly Po and Donald Johnson, 6–4, 6–4.
['tennis event']