athletics at the 1999 Pan American Games – men's 4 × 400 metres relay
{'<entity_0>': "athletics at the 1999 Pan American Games – men's 4 × 400 metres relay", '<entity_1>': 'athletics at the 1999 Pan American Games'}
[["athletics at the 1999 Pan American Games – men's 4 × 400 metres relay", 'part of', 'athletics at the 1999 Pan American Games']]
The <entity_0> event at the <entity_1> was held July 28–30.
['sporting event']