2011–12 European Challenge Cup pool stage
{'<entity_0>': '2011–12 European Challenge Cup pool stage', '<entity_1>': 'rugby union'}
[['2011–12 European Challenge Cup pool stage', 'sport', 'rugby union']]
The <entity_0> was the opening stage of the 16th season of the European Challenge Cup, the second-tier competition for European <entity_1> clubs.
['sports season']