user: Question: Which Current Club has a Rank of 4?
Columns: ['Rank', 'Name', 'Years', 'Current Club', 'Goals', 'Apps', 'Ratio']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Lionel Messi', '2004–', 'Barcelona', 223.0, 256.0, 0.87]
SQL:

assistant: SELECT "Current Club" FROM "Table" WHERE "Rank" = 4.0;