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

### Instruction:
Which Tonnage (GRT) is the highest one that has a Date of 16 june 1940?

### Inputs:
table_name: table, columns: ['Date', 'U-boat', 'Name', 'Nationality', 'Tonnage (GRT)', 'Fate']

### Response:
SELECT MAX Tonnage (GRT) FROM table WHERE Date = 16 june 1940