user: Question: What's the nationality of Ray Norton with a time of 20.6?
Columns: ['Time', 'Athlete', 'Nationality', 'Location of race', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['20.6y', 'Andy Stanfield', 'United States', 'Philadelphia , United States', 'May 26, 1951']
SQL:

assistant: SELECT "Nationality" FROM "Table" WHERE "Time" = '20.6' AND "Athlete" = 'Ray Norton';