user: Question: What is the highest average of celebrity Natalia Lesz, who is ranked greater than 4?
Columns: ['Rank', 'Celebrity', 'Professional Partner', 'Season', 'Average']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Natasza Urbańska', 'Ján Kliment', 10.0, 39.18]
SQL:

assistant: SELECT MAX("Average") FROM "Table" WHERE "Rank" > 4.0 AND "Celebrity" = 'Natalia Lesz';