user: Question: What was the Winning score for the mynavi ABC Championship Tournament?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['23 May 2007', 'Munsingwear Open KSB Cup (as an amateur)', '–12 (72-69-69-66=276)', '1 stroke', 'Katsumasa Miyamoto']
SQL:

assistant: SELECT "Winning score" FROM "Table" WHERE "Tournament" = 'mynavi ABC Championship';