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_18946749_4 (prominence__m_ VARCHAR, rank VARCHAR)
### Question:
How many values of prominence(m) occur at rank 5?
### Answer:
SELECT COUNT(prominence__m_) FROM table_18946749_4 WHERE rank = 5