user: Question: What is the average number of ties for years with more than 19 wins?
Columns: ['Year', 'Matches', 'Wins', 'Losses', 'No Result', 'Tied', 'Success Rate']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['2008', 16.0, 9.0, 7.0, 0.0, 0.0, '56.25%']
SQL:

assistant: SELECT AVG("Tied") FROM "Table" WHERE "Wins" > 19.0;