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

### Instruction:
What is the lowest round with a place of t15 in a year earlier than 1998?

### Inputs:
table_name: table, columns: ['Year', 'Tournament', 'Round 1', 'Round 2', 'Round 3', 'Round 4', 'Score', 'To par', 'Place', 'Money (￥)']

### Response:
SELECT MIN Round 1 FROM table WHERE Place = t15 AND Year < 1998