water polo at the 1961 Summer Universiade
{'<entity_0>': 'water polo at the 1961 Summer Universiade', '<entity_1>': 'water polo'}
[['water polo at the 1961 Summer Universiade', 'sport', 'water polo']]
<entity_1> events were contested at the <entity_0> in Sofia, Bulgaria.
['sport competition at a multi-sport event']