Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_20333 ( "Week" real, "Date" text, "Result" text, "Record" text, "Opponent" text, "Points For" real, "Points Against" real, "First Downs" real, "Attendance" real )

### Question ###
What is the maximum number of points against when the attendance was 47678?

### Accurate SQL ###

SELECT MAX("Points Against") FROM table_20333 WHERE "Attendance" = '47678'