user: Question: When Tom Watson (5/6) won the Senior British Open who won the Senior PGA Championship?
Columns: ['Year', 'Senior PGA Championship', 'The Tradition', 'Senior Players Championship', 'U.S. Senior Open', 'Senior British Open']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2013.0, 'Kōki Idoki', 'David Frost', 'Kenny Perry (1/2)', 'Kenny Perry (2/2)', 'Mark Wiebe']
SQL:

assistant: SELECT "Senior PGA Championship" FROM "Table" WHERE "Senior British Open" = 'Tom Watson (5/6)';