CREATE TABLE table_51774 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Attendance" FLOAT, "Record" TEXT)

What is the average attendance when Brewers are the opponent with a score of 6 3?
SELECT AVG("Attendance") FROM table_51774 WHERE "Opponent" = 'brewers' AND "Score" = '6–3'
SELECT AVG("Attendance") FROM "table_51774" WHERE "Opponent" = 'brewers' AND "Score" = '6–3'