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

### Instruction:
Tell me the class for admiral and hms frobisher

### Inputs:
table_name: table, columns: ['Ship', 'Guns', 'Class', 'Captain', 'Rank', 'Year']

### Response:
SELECT Class FROM table WHERE Rank = admiral AND Ship = hms frobisher