Premise: Some of the subsidies exceed capital and maintenance  If the White Sox fail to draw 1.5 million annual fans at New Comiskey Park in the 11th through 20th years of their lease, the state of Illinois is contractually obliged to cover the shortfall at the gate by buying upto 300,000 tickets.

Hypothesis: The state of Illinois must buy lots of tickets if the white Sox don't draw large enough crowds. 
Relation: entailment