Which men's singles has mixed doubles with Kevin Cao Melody Liang?
CREATE TABLE table_43856 (
    "Year" real,
    "Men's singles" text,
    "Women's singles" text,
    "Men's doubles" text,
    "Women's doubles" text,
    "Mixed doubles" text
)
SELECT "Men's singles" FROM table_43856 WHERE "Mixed doubles" = 'kevin cao melody liang'
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 men's singles has mixed doubles with Kevin Cao Melody Liang? ### Input: CREATE TABLE table_43856 (
    "Year" real,
    "Men's singles" text,
    "Women's singles" text,
    "Men's doubles" text,
    "Women's doubles" text,
    "Mixed doubles" text
) ### Response: SELECT "Men's singles" FROM table_43856 WHERE "Mixed doubles" = 'kevin cao melody liang'