Which date has opponents, Akgul Amanmuradova Nina Bratchikova, in the final?
CREATE TABLE table_71400 (
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Tier" text,
    "Partner" text,
    "Opponents in the final" text,
    "Score" text
)
SELECT "Date" FROM table_71400 WHERE "Opponents in the final" = 'akgul amanmuradova nina bratchikova'
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 opponents, Akgul Amanmuradova Nina Bratchikova, in the final? ### Input: CREATE TABLE table_71400 (
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Tier" text,
    "Partner" text,
    "Opponents in the final" text,
    "Score" text
) ### Response: SELECT "Date" FROM table_71400 WHERE "Opponents in the final" = 'akgul amanmuradova nina bratchikova'