What is Opponent In The Final, when Date is before 1991, and when Outcome is 'Runner-Up'?
CREATE TABLE table_76312 (
    "Outcome" text,
    "Date" real,
    "Championship" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score in the final" text
)
SELECT "Opponent in the final" FROM table_76312 WHERE "Date" < '1991' AND "Outcome" = 'runner-up'
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 is Opponent In The Final, when Date is before 1991, and when Outcome is 'Runner-Up'? ### Input: CREATE TABLE table_76312 (
    "Outcome" text,
    "Date" real,
    "Championship" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score in the final" text
) ### Response: SELECT "Opponent in the final" FROM table_76312 WHERE "Date" < '1991' AND "Outcome" = 'runner-up'