user: Question: What is the average lane for China?
Columns: ['Rank', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 4.0, 'Ágnes Kovács', 'Hungary', '2:24.03']
SQL:

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