user: Question: What is the highest Week, when Result is W 34-21?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 17, 1972', 'San Diego Chargers', 'W 34-3', 59438.0]
SQL:

assistant: SELECT MAX("Week") FROM "Table" WHERE "Result" = 'W 34-21';