user: Question: What is the score for set 2 when set 3 was 15–6?
Columns: ['Date', 'Score', 'Set 1', 'Set 2', 'Set 3', 'Total']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['13 Nov', '3–0', '15–6', '15–12', '15–13', '45–31']
SQL:

assistant: SELECT "Set 2" FROM "Table" WHERE "Set 3" = '15–6';