What is NRG stadium used for?

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Tags

1. #retractable
2. #seating
3. #facility
4. #multi
5. #first
6. #united
7. #formerly
8. #million
9. #capacity
10. #texas
11. #constructed
12. #stadium
13. #houston
14. #states
15. #reliant
16. #pronounced
17. #purpose