Question: When the average away attendance is 1.889 in the Superettan, what's the average home attendance?
Schema: create table table_1816947_2 (average_attendance_home varchar, division___section varchar, average_attendance_away varchar, PRIMARY KEY (average_attendance_home))
SQL: select average_attendance_home from table_1816947_2 where division___section = "superettan" and average_attendance_away = "1.889"