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_name_20 (episode INTEGER, segment_d VARCHAR)
### Question:
What episode has  a manual motorcycle transmissions section D?
### Answer:
SELECT SUM(episode) FROM table_name_20 WHERE segment_d = "manual motorcycle transmissions"