What team lost on 20 August 1989?
CREATE TABLE table_56417 (
    "Season" text,
    "Cup FinalDate" text,
    "WinningTeam" text,
    "Score" text,
    "LosingTeam" text,
    "Cup Final Attendance" text
)
SELECT "LosingTeam" FROM table_56417 WHERE "Cup FinalDate" = '20 august 1989'
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 team lost on 20 August 1989? ### Input: CREATE TABLE table_56417 (
    "Season" text,
    "Cup FinalDate" text,
    "WinningTeam" text,
    "Score" text,
    "LosingTeam" text,
    "Cup Final Attendance" text
) ### Response: SELECT "LosingTeam" FROM table_56417 WHERE "Cup FinalDate" = '20 august 1989'