Task: Text to Code
Input (English): SQL: SELECT T2.name FROM flight AS T1 JOIN aircraft AS T2 ON T1.aid = T2.aid WHERE T1.origin = "John Williams"
Feedback: Add employee table in step 1 , interchange origin with employee's name , ensure employee's employee id present in certificate table .
Output (English): SELECT T3.name FROM Employee AS T1 JOIN Certificate AS T2 ON T1.eid  =  T2.eid JOIN Aircraft AS T3 ON T3.aid  =  T2.aid WHERE T1.name  =  "John Williams"