CREATE TABLE table_57300 ("Model" TEXT, "Build year" TEXT, "Total produced" FLOAT, "Wheel arrangement" TEXT, "Prime mover" TEXT, "Power output" TEXT)

What is Prime Mover of Model FM CFA-16-4?
SELECT "Prime mover" FROM table_57300 WHERE "Model" = 'fm cfa-16-4'
SELECT "Prime mover" FROM "table_57300" WHERE "Model" = 'fm cfa-16-4'