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 (prominence__m_ INTEGER, col__m_ VARCHAR)
### Question:
Which Prominence (m) has a Col (m) of 350?
### Answer:
SELECT AVG(prominence__m_) FROM table_name_21 WHERE col__m_ = 350