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_91 ( wins INTEGER, played VARCHAR, goal_difference VARCHAR, club VARCHAR )

### Question ###
Which Wins have a Goal Difference larger than 12, and a Club of granada cf, and Played larger than 30?

### Accurate SQL ###

SELECT AVG(wins) FROM table_name_91 WHERE goal_difference > 12 AND club = "granada cf" AND played > 30