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 (b_score INTEGER, gymnast VARCHAR)
### Question:
what is the average b score when the gymnast is kōhei uchimura ( jpn )?
### Answer:
SELECT AVG(b_score) FROM table_name_20 WHERE gymnast = "kōhei uchimura ( jpn )"