CREATE TABLE table_52847 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Attendance" FLOAT, "Record" TEXT)

What is the average number in attendance on September 16?
SELECT AVG("Attendance") FROM table_52847 WHERE "Date" = 'september 16'
SELECT AVG("Attendance") FROM "table_52847" WHERE "Date" = 'september 16'