What is the series number for the episode with production code bdf109?
CREATE TABLE table_28019988_2 (series__number VARCHAR, production_code VARCHAR)
SELECT series__number FROM table_28019988_2 WHERE production_code = "BDF109"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_28019988_2 (series__number VARCHAR, production_code VARCHAR) Question: What is the series number for the episode with production code bdf109? [/INST] SELECT series__number FROM table_28019988_2 WHERE production_code = "BDF109" </s>