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

### Instruction:
What is the isotopic mass (u) when the nuclide is 89 y?

### Inputs:
table_name: table, columns: ['Element', 'Nuclide', 'Z ( p )', 'N ( n )', 'isotopic mass ( u )']

### Response:
SELECT isotopic mass ( u ) FROM table WHERE Nuclide = 89 y