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_2189647_1 (name_or_number VARCHAR, yield__megatons_ VARCHAR)
### Question:
Name the name for 15 yield
### Answer:
SELECT name_or_number FROM table_2189647_1 WHERE yield__megatons_ = "15"