user: Question: What type of environment is the venue that was built in 2003?
Columns: ['Venue', 'Location', 'Capacity', 'Owner', 'Environment', 'Year Built']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Bank of America Stadium', 'Uptown Charlotte', '73,778', 'Carolina Panthers', 'Open air, natural grass', '1996']
SQL:

assistant: SELECT "Environment" FROM "Table" WHERE "Year Built" = '2003';