user: Question: What is the average lane for Australia?
Columns: ['Rank', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [1.0, 5.0, 'Natalie Coughlin', 'United States', 53.7]
SQL:

assistant: SELECT AVG("Lane") FROM "Table" WHERE "Nationality" = 'Australia';