Question: What is the lowest age of an astronaut named Stu Roosa?
SQL: SELECT MIN("Age on mission") FROM "2-129540-2" WHERE "Name" = 'Stu Roosa';

Question: What mission did the astronaut who 38 years old on the mission and who served in NASA serve on?
SQL: SELECT "Mission" FROM "2-129540-2" WHERE "Service" = 'NASA' AND "Age on mission" = 38.0;