What date was there a playoff on the margin of victory during the Shirley Englehorn Invitational?
CREATE TABLE table_name_36 (
    date VARCHAR,
    margin_of_victory VARCHAR,
    tournament VARCHAR
)
SELECT date FROM table_name_36 WHERE margin_of_victory = "playoff" AND tournament = "shirley englehorn invitational"
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 was there a playoff on the margin of victory during the Shirley Englehorn Invitational? ### Input: CREATE TABLE table_name_36 (
    date VARCHAR,
    margin_of_victory VARCHAR,
    tournament VARCHAR
) ### Response: SELECT date FROM table_name_36 WHERE margin_of_victory = "playoff" AND tournament = "shirley englehorn invitational"