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

### Instruction:
Who was the sponsor on April 22, 2004?

### Inputs:
table_name: table, columns: ['Congress', 'Bill number', 'Date introduced', 'Sponsor', '# of cosponsors']

### Response:
SELECT Sponsor FROM table WHERE Date introduced = april 22, 2004