Which Opponent had a Surface of hard, and a Partner of maria elena camerin?
CREATE TABLE table_6703 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Partner" text,
    "Opponent" text,
    "Score" text
)
SELECT "Opponent" FROM table_6703 WHERE "Surface" = 'hard' AND "Partner" = 'maria elena camerin'
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 Opponent had a Surface of hard, and a Partner of maria elena camerin? ### Input: CREATE TABLE table_6703 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Partner" text,
    "Opponent" text,
    "Score" text
) ### Response: SELECT "Opponent" FROM table_6703 WHERE "Surface" = 'hard' AND "Partner" = 'maria elena camerin'