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_19744915_3 ( scoreboard VARCHAR, karen VARCHAR )

### Question ###
what is the scoreboard when karen was 4.5

### Accurate SQL ###

SELECT scoreboard FROM table_19744915_3 WHERE karen = "4.5"