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

### Instruction:
What is the D 50 √ when the D 47 √ is r 27 √?

### Inputs:
table_name: table, columns: ['D 50 √', 'D 49 √', 'D 48 √', 'D 47 √', 'D 46 √', 'D 45 √', 'D 44 √', 'D 43 √', 'D 42 √', 'D 41 √']

### Response:
SELECT D 50 √ FROM table WHERE D 47 √ = r 27 √