user: Question: Who was the wenning witcher when Ezequiel Astacio was the losing pitcher?
Columns: ['Date', 'Winning Team', 'Score', 'Winning Pitcher', 'Losing Pitcher', 'Attendance', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['May 20', 'Texas', '7–3', 'Kenny Rogers', 'Brandon Backe', 38109.0, 'Arlington']
SQL:

assistant: SELECT "Winning Pitcher" FROM "Table" WHERE "Losing Pitcher" = 'Ezequiel Astacio';