user: Question: In what week(s) did the Broncos go up against the Cleveland Browns?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 4, 1994', 'San Diego Chargers', 'L 37–34', '74,032']
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Opponent" = 'Cleveland Browns';