user: Question: Name the most challenge cup for Damon Gray
Columns: ['Player', 'League', 'Scottish Cup', 'League Cup', 'Challenge Cup', 'Total']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Gary Harkins', 9.0, 1.0, 1.0, 1.0, 12.0]
SQL:

assistant: SELECT MAX("Challenge Cup") FROM "Table" WHERE "Player" = 'Damon Gray';