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_15187735_18 (episode VARCHAR, segment_c VARCHAR)
### Question:
Name the number of episods for segment c being s oyster
### Answer:
SELECT COUNT(episode) FROM table_15187735_18 WHERE segment_c = "s Oyster"