user: ### NOW ANSWER:
Question: Which Goals against have a Club of cd castellón, and Points smaller than 24?
Columns: ['Position', 'Club', 'Played', 'Points', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Goal Difference']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'CD Tenerife', 30.0, 40.0, 17.0, 6.0, 7.0, 45.0, 23.0, 22.0]
SQL:

assistant: SELECT AVG("Goals against") FROM "Table" WHERE "Club" = 'cd castellón' AND "Points" < 24.0;