user: Question: Who constructed the car that has a Time/Retired of Engine, and over 50 laps?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jackie Stewart', 'Tyrrell - Ford', 75.0, '1:49:03.4', 4.0]
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Time/Retired" = 'Engine' AND "Laps" > 50.0;