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

### Instruction:
How many years did the team that has a Singles win-Loss of 4-9 and first played before 1999?

### Inputs:
table_name: table, columns: ['Player', 'Total Win-Loss', 'Singles Win-Loss', 'Doubles Win-Loss', 'No. of ties', 'First year played', 'Years Played']

### Response:
SELECT SUM Years Played FROM table WHERE Singles Win-Loss = 4-9 AND First year played < 1999