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_15026994_3 ( writer VARCHAR, director VARCHAR )

### Question ###
Who wrote the episode that David Tucker directed?

### Accurate SQL ###

SELECT COUNT(writer) FROM table_15026994_3 WHERE director = "David Tucker"