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

### Instruction:
How many where killed under Major-General Jean Victor de Constant Rebecque's command?

### Inputs:
table_name: table, columns: ['Unit', 'Commander', 'Complement', 'Killed', 'Wounded', 'Missing']

### Response:
SELECT Killed FROM table WHERE Commander = Major-General Jean Victor de Constant Rebecque