user: Question: Name the least week for opponent of Washington Redskins
Columns: ['Week', 'Date', 'Opponent', 'Result', 'TV Time', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 6, 1998', 'Arizona Cardinals', 'W 38–10', 'FOX 4:15pm', '63,602']
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Opponent" = 'Washington Redskins';