who was the opponent where the date was the 21st?
CREATE TABLE table_21361 (
    "Date" text,
    "Opponent" text,
    "Venue" text,
    "Result" text,
    "Attendance" text,
    "Competition" text,
    "Man of the Match" text
)
SELECT "Opponent" FROM table_21361 WHERE "Date" = '21st'
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: who was the opponent where the date was the 21st? ### Input: CREATE TABLE table_21361 (
    "Date" text,
    "Opponent" text,
    "Venue" text,
    "Result" text,
    "Attendance" text,
    "Competition" text,
    "Man of the Match" text
) ### Response: SELECT "Opponent" FROM table_21361 WHERE "Date" = '21st'