who was the director of the episode with production code ad1a26?
CREATE TABLE table_name_38 (directed_by VARCHAR, production_code VARCHAR)
SELECT directed_by FROM table_name_38 WHERE production_code = "ad1a26"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_38 (directed_by VARCHAR, production_code VARCHAR) Question: who was the director of the episode with production code ad1a26? [/INST] SELECT directed_by FROM table_name_38 WHERE production_code = "ad1a26" </s>