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

### Instruction:
Which athlete performed before 1984 in an 800 m event?

### Inputs:
table_name: table, columns: ['Year', 'Event', 'Record', 'Athlete', 'Nationality']

### Response:
SELECT Athlete FROM table WHERE Year < 1984 AND Event = 800 m