CREATE TABLE table_57901 ("Season" FLOAT, "Div." TEXT, "Tms." FLOAT, "Pos." FLOAT, "Attendance/G" FLOAT, "Emperor's Cup" TEXT)

What was Attendance/G with Tms more than 18?
SELECT AVG("Attendance/G") FROM table_57901 WHERE "Tms." > '18'
SELECT AVG("Attendance/G") FROM "table_57901" WHERE "Tms." > '18'