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

### Instruction:
What was the Sat 21 Aug time for the driver whose Thurs 26 Aug time was 20' 56.01 108.143mph?

### Inputs:
table_name: table, columns: ['Rank', 'Rider', 'Sat 21 Aug', 'Mon 23 Aug', 'Tues 24 Aug', 'Wed 25 Aug', 'Thurs 26 Aug', 'Fri 27 Aug', 'Sat 28 Aug']

### Response:
SELECT Sat 21 Aug FROM table WHERE Thurs 26 Aug = 20' 56.01 108.143mph