What is the production code of the episode written by Jeff Filgo?
CREATE TABLE table_27988281_1 (production_code INTEGER, written_by VARCHAR)
SELECT MAX(production_code) FROM table_27988281_1 WHERE written_by = "Jeff Filgo"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_27988281_1 (production_code INTEGER, written_by VARCHAR) Question: What is the production code of the episode written by Jeff Filgo? [/INST] SELECT MAX(production_code) FROM table_27988281_1 WHERE written_by = "Jeff Filgo" </s>