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

### Instruction:
What is the decay mode of the 265m hs isotope discovered in 1984?

### Inputs:
table_name: table, columns: ['Isotope', 'Half-life', 'Decay mode', 'Discovery year', 'Reaction']

### Response:
SELECT Decay mode FROM table WHERE Discovery year = 1984 AND Isotope = 265m hs