Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1971734_1 (prod__number VARCHAR, filmed VARCHAR)
### Question:
What was the production number of the episode filmed in aug/sept 1968?
### Answer:
SELECT prod__number FROM table_1971734_1 WHERE filmed = "Aug/Sept 1968"