“Exactly nine corners occur”

This trader is expressing a view that South Africa vs. Korea Republic: O/U 10.5 Total Corners, South Africa vs. Korea Republic: O/U 8.5 Total Corners, South Africa vs. Korea Republic: O/U 12.5 Total Corners, and 1 more are correlated outcomes, committing $10,061 to this thesis across 4 prediction markets on Polymarket.