What was the series# with the original airdate of october 23, 1967?
CREATE TABLE table_21146729_6 (series__number INTEGER, original_airdate VARCHAR)
SELECT MAX(series__number) FROM table_21146729_6 WHERE original_airdate = "October 23, 1967"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21146729_6 (series__number INTEGER, original_airdate VARCHAR) Question: What was the series# with the original airdate of october 23, 1967? [/INST] SELECT MAX(series__number) FROM table_21146729_6 WHERE original_airdate = "October 23, 1967" </s>