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_94 ( length VARCHAR, circuit VARCHAR, class VARCHAR )

### Question ###
What is the length of the Laguna Seca Raceway circuit with a class of gtu?

### Accurate SQL ###

SELECT length FROM table_name_94 WHERE circuit = "laguna seca raceway" AND class = "gtu"