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

### Instruction:
Which tournament has hard as the surface and apr. 12, 1998 as the date?

### Inputs:
table_name: table, columns: ['Date', 'Tournament', 'Surface', 'Opponent in the Final', 'Score']

### Response:
SELECT Tournament FROM table WHERE Surface = hard AND Date = apr. 12, 1998