Who was the opponent of Anand in the match with 20 moves that opened with E15 Queen's Indian Defence?
CREATE TABLE table_12970 (
    "White" text,
    "Black" text,
    "Year" real,
    "Result" text,
    "Moves" real,
    "Tournament" text,
    "Opening" text
)
SELECT "Black" FROM table_12970 WHERE "White" = 'anand' AND "Moves" = '20' AND "Opening" = 'e15 queen''s indian defence'
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: Who was the opponent of Anand in the match with 20 moves that opened with E15 Queen's Indian Defence? ### Input: CREATE TABLE table_12970 (
    "White" text,
    "Black" text,
    "Year" real,
    "Result" text,
    "Moves" real,
    "Tournament" text,
    "Opening" text
) ### Response: SELECT "Black" FROM table_12970 WHERE "White" = 'anand' AND "Moves" = '20' AND "Opening" = 'e15 queen''s indian defence'