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

### Instruction:
What is the average pots of Alfa Romeo v12 after 1983?

### Inputs:
table_name: table, columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Pts.']

### Response:
SELECT AVG Pts. FROM table WHERE Engine = alfa romeo v12 AND Year > 1983