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_17304621_14 ( upstream VARCHAR, price_tl VARCHAR )

### Question ###
What is the upstream speed of the network that costs 39 tl?

### Accurate SQL ###

SELECT upstream FROM table_17304621_14 WHERE price_tl = "39 TL"