What date sent has cygnus as a constellation, and hd 190360 as a designation HD?
CREATE TABLE table_38581 (
    "Designation HD" text,
    "Constellation" text,
    "Date sent" text,
    "Arrival date" text,
    "Message" text
)
SELECT "Date sent" FROM table_38581 WHERE "Constellation" = 'cygnus' AND "Designation HD" = 'hd 190360'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What date sent has cygnus as a constellation, and hd 190360 as a designation HD? ### Input: CREATE TABLE table_38581 (
    "Designation HD" text,
    "Constellation" text,
    "Date sent" text,
    "Arrival date" text,
    "Message" text
) ### Response: SELECT "Date sent" FROM table_38581 WHERE "Constellation" = 'cygnus' AND "Designation HD" = 'hd 190360'