user: Question: What is the Opponent that has a Rank of 4?
Columns: ['Rank', 'Margin', 'Opponent', 'Venue', 'Season']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', '179 runs', 'Matabeleland', 'Bulawayo Athletic Club , Bulawayo', '1995/96']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Rank" = '4';