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_81 (age_on_mission INTEGER, name VARCHAR)
### Question:
What is the lowest age of an astronaut named Stu Roosa?
### Answer:
SELECT MIN(age_on_mission) FROM table_name_81 WHERE name = "stu roosa"