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

### Instruction:
What is the highest rank for a 6:52.70 time and notes of sa/b?

### Inputs:
table_name: table, columns: ['Rank', 'Athlete', 'Country', 'Time', 'Notes']

### Response:
SELECT MAX Rank FROM table WHERE Notes = sa/b AND Time = 6:52.70