How many times were Duke the opponents?
CREATE TABLE table_23873 (
    "Game" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Tar Heels points" real,
    "Opponents" real,
    "Record" text
)
SELECT COUNT("Opponents") FROM table_23873 WHERE "Opponent" = 'Duke'
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: How many times were Duke the opponents? ### Input: CREATE TABLE table_23873 (
    "Game" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Tar Heels points" real,
    "Opponents" real,
    "Record" text
) ### Response: SELECT COUNT("Opponents") FROM table_23873 WHERE "Opponent" = 'Duke'