Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What start has a ford cosworth dfx as the engine, a year later than 1981, and kraco enterprises as the entrant?

### Inputs:
table_name: table, columns: ['Year', 'Chassis', 'Engine', 'Start', 'Finish', 'Entrant']

### Response:
SELECT Start FROM table WHERE Engine = ford cosworth dfx AND Year > 1981 AND Entrant = kraco enterprises