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_56 (rank INTEGER, notes VARCHAR, time VARCHAR)
### Question:
What is the highest rank with the notes of sa/b, and a time of 6:39.07?
### Answer:
SELECT MAX(rank) FROM table_name_56 WHERE notes = "sa/b" AND time = "6:39.07"