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

### Instruction:
Name the class for 4th position with year before 2006

### Inputs:
table_name: table, columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']

### Response:
SELECT Class FROM table WHERE Pos. = 4th AND Year < 2006