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_name_6 ( game INTEGER, december VARCHAR, points VARCHAR, opponent VARCHAR )

### Question ###
Which Game has Points of 53, and an Opponent of @ minnesota north stars, and a December larger than 30?

### Accurate SQL ###

SELECT AVG(game) FROM table_name_6 WHERE points = 53 AND opponent = "@ minnesota north stars" AND december > 30