CREATE TABLE table_57375 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Attendance" FLOAT, "Record" CLOB)

What is the average attendance against the expos?
SELECT AVG("Attendance") FROM table_57375 WHERE "Opponent" = 'expos'
SELECT AVG("Attendance") FROM "table_57375" WHERE "Opponent" = 'expos'