user: Question: What is the Highest Goals for Grella?
Columns: ['Nat.', 'Name', 'Since', 'Goals', 'Transfer fee', 'Notes']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['DEN', 'Ankergren', '2007', 0.0, 'Undisclosed', 'Leeds United']
SQL:

assistant: SELECT MAX("Goals") FROM "Table" WHERE "Name" = 'Grella';