user: Question: What is the at opponent's venue record where the current streak is W 4?
Columns: ['Missouri vs.', 'Overall Record', 'at Columbia', "at Opponent's Venue", 'at Neutral Site', 'Last 5 Meetings', 'Last 10 Meetings', 'Current Streak', 'During Time in Big 12']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Baylor', 'MU, 16-10', 'MU, 10-2', 'BU, 6-4', 'Tied, 2-2', 'MU, 4-1', 'MU, 7-3', 'W 4', 'MU, 13-6']
SQL:

assistant: SELECT "at Opponent's Venue" FROM "Table" WHERE "Current Streak" = 'W 4';