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_74 ( grid INTEGER, manufacturer VARCHAR, laps VARCHAR )

### Question ###
What is the lowest grid number that had a rider with KTM as the manufacturer who did more than 20 laps?

### Accurate SQL ###

SELECT MIN(grid) FROM table_name_74 WHERE manufacturer = "ktm" AND laps > 20