user: Question: What was the average number of "goals for", scored in the club real oviedo that had a "goal difference" lower than -16 and fewer than 9 wins?
Columns: ['Position', 'Club', 'Played', 'Points', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Goal Difference']
Types: ['real', 'text', 'real', 'text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Celta de Vigo', 38.0, '53+15', 22.0, 9.0, 7.0, 79.0, 40.0, 39.0]
SQL:

assistant: SELECT AVG("Goals for") FROM "Table" WHERE "Goal Difference" < -16.0 AND "Club" = 'real oviedo' AND "Wins" < 9.0;