user: Question: What is Prime Mover of Model FM CFA-16-4?
Columns: ['Model', 'Build year', 'Total produced', 'Wheel arrangement', 'Prime mover', 'Power output']
Types: ['text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['FM CFA-16-4', '1950–1953', 36.0, 'B-B', 'FM 38D-8 opposed piston', 'hp (MW)']
SQL:

assistant: SELECT "Prime mover" FROM "Table" WHERE "Model" = 'FM CFA-16-4';