user: Question: What is the highest rank for championships with christy heffernan with over 4 matches?
Columns: ['Rank', 'Player', 'County', 'Tally', 'Total', 'Matches', 'Average']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Pádraig Horan', 'Offaly', '5–17', 32.0, 4.0, 8.0]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Player" = 'christy heffernan' AND "Matches" > 4.0;