user: Question: Louisville International Airport had how many tonnes of cargo in 2011?
Columns: ['Rank', 'Airport Name', 'Location', 'IATA Code', 'Tonnes', '% Chg. 2010/11']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Memphis International Airport', 'Memphis, Tennessee', 'MEM', '3,916,410', '0 0.0%']
SQL:

assistant: SELECT "Tonnes" FROM "Table" WHERE "Airport Name" = 'Louisville International Airport';