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

### Instruction:
What is the Parts-per example of 2×10 −6?

### Inputs:
table_name: table, columns: ['Coefficient', 'Parts-per example', 'Uno equiv.', 'Symbol form', 'Value of quantity']

### Response:
SELECT Parts-per example FROM table WHERE Value of quantity = 2×10 −6