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

### Instruction:
Which average Winner's share ($) has a Score of 281 (−7), and a Player of hale irwin, and a Year smaller than 1983?

### Inputs:
table_name: table, columns: ['Year', 'Player', 'Country', 'Score', 'Margin of victory', "Winner's share ( $ )"]

### Response:
SELECT AVG Winner's share ( $ ) FROM table WHERE Score = 281 (−7) AND Player = hale irwin AND Year < 1983