Who wrote the episode that David Tucker directed?
CREATE TABLE table_15026994_3 (writer VARCHAR, director VARCHAR)
SELECT COUNT(writer) FROM table_15026994_3 WHERE director = "David Tucker"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15026994_3 (writer VARCHAR, director VARCHAR) Question: Who wrote the episode that David Tucker directed? [/INST] SELECT COUNT(writer) FROM table_15026994_3 WHERE director = "David Tucker" </s>