2011 NASCAR Nationwide Series
{'<entity_0>': '2011 NASCAR Nationwide Series', '<entity_1>': 'NASCAR Xfinity Series'}
[['2011 NASCAR Nationwide Series', 'sports season of league or competition', 'NASCAR Xfinity Series']]
The <entity_0> was the thirtieth season of <entity_1> stock car racing in the United States.
['sports season']