Which Date has an Opponent of newcastle united, and a Result of 2 1?
CREATE TABLE table_55558 (
    "Date" text,
    "Opponent" text,
    "Venue" text,
    "Result" text,
    "Attendance" real
)
SELECT "Date" FROM table_55558 WHERE "Opponent" = 'newcastle united' AND "Result" = '2–1'
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: Which Date has an Opponent of newcastle united, and a Result of 2 1? ### Input: CREATE TABLE table_55558 (
    "Date" text,
    "Opponent" text,
    "Venue" text,
    "Result" text,
    "Attendance" real
) ### Response: SELECT "Date" FROM table_55558 WHERE "Opponent" = 'newcastle united' AND "Result" = '2–1'