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_25 (american VARCHAR)
### Question:
What is 17th c., when American is "ə"?
### Answer:
SELECT 17 AS th_c FROM table_name_25 WHERE american = "ə"