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

### Instruction:
What was the 1989 result for the tournament with 1984 of a, 1985 of a, and 1990 of a?

### Inputs:
table_name: table, columns: ['Tournament', '1983', '1984', '1985', '1986', '1987', '1988', '1989', '1990', 'Career SR']

### Response:
SELECT 1989 FROM table WHERE 1984 = a AND 1985 = a AND 1990 = a