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

### Instruction:
What date sent has cygnus as a constellation, and hd 190360 as a designation HD?

### Inputs:
table_name: table, columns: ['Designation HD', 'Constellation', 'Date sent', 'Arrival date', 'Message']

### Response:
SELECT Date sent FROM table WHERE Constellation = cygnus AND Designation HD = hd 190360