What co-singer has sukhwinder singh as the composer?
CREATE TABLE table_13056 (
    "Year" real,
    "Song" text,
    "Film" text,
    "Co-Singer" text,
    "Composer" text,
    "Lyricist" text
)
SELECT "Co-Singer" FROM table_13056 WHERE "Composer" = 'sukhwinder singh'
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 co-singer has sukhwinder singh as the composer? ### Input: CREATE TABLE table_13056 (
    "Year" real,
    "Song" text,
    "Film" text,
    "Co-Singer" text,
    "Composer" text,
    "Lyricist" text
) ### Response: SELECT "Co-Singer" FROM table_13056 WHERE "Composer" = 'sukhwinder singh'