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_19517621_3 ( directed_by VARCHAR, title VARCHAR )

### Question ###
If the title if the Lost Boy, how many directors were there?

### Accurate SQL ###

SELECT COUNT(directed_by) FROM table_19517621_3 WHERE title = "The Lost Boy"