On what surface did Katarina Srebotnik play Paola Su rez?
CREATE TABLE table_50622 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent in Final" text,
    "Score in Final" text
)
SELECT "Surface" FROM table_50622 WHERE "Opponent in Final" = 'paola suárez'
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: On what surface did Katarina Srebotnik play Paola Su rez? ### Input: CREATE TABLE table_50622 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent in Final" text,
    "Score in Final" text
) ### Response: SELECT "Surface" FROM table_50622 WHERE "Opponent in Final" = 'paola suárez'