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_16279520_1 ( length VARCHAR, release VARCHAR )

### Question ###
What was the length time of the 3.5 release?

### Accurate SQL ###

SELECT length FROM table_16279520_1 WHERE release = "3.5"