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_18 (yeast_ortholog VARCHAR, mouse_ortholog VARCHAR)
### Question:
What is the yeast ortholog of mouse ortholog MMS19?
### Answer:
SELECT yeast_ortholog FROM table_name_18 WHERE mouse_ortholog = "mms19"