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_28 ( fast_laps VARCHAR, points VARCHAR, series VARCHAR, races VARCHAR )

### Question ###
How many fast laps are in 6 races with 30 points in the World Series by Nissan?

### Accurate SQL ###

SELECT fast_laps FROM table_name_28 WHERE series = "world series by nissan" AND races = "6" AND points = "30"