What is the round when the opponent is Andre Roberts?
CREATE TABLE table_8728 (
    "Res." text,
    "Record" text,
    "Opponent" text,
    "Method" text,
    "Event" text,
    "Round" text
)
SELECT "Round" FROM table_8728 WHERE "Opponent" = 'andre roberts'
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 is the round when the opponent is Andre Roberts? ### Input: CREATE TABLE table_8728 (
    "Res." text,
    "Record" text,
    "Opponent" text,
    "Method" text,
    "Event" text,
    "Round" text
) ### Response: SELECT "Round" FROM table_8728 WHERE "Opponent" = 'andre roberts'