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

### Instruction:
What is the average number of people killed with a Perpetrator of wirjo, 42?

### Inputs:
table_name: table, columns: ['Perpetrator', 'Location', 'Country', 'Killed', 'Injured']

### Response:
SELECT AVG Killed FROM table WHERE Perpetrator = wirjo, 42