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_21 (year VARCHAR, site VARCHAR, score VARCHAR)
### Question:
When has a Site of tainan city and a Score of 8–6?
### Answer:
SELECT year FROM table_name_21 WHERE site = "tainan city" AND score = "8–6"