List the possible children per donor levels for countries where the allowed recipients is no data.
CREATE TABLE table_20603 (
    "Country" text,
    "Donor payment" text,
    "Children per donor" text,
    "Donor anonymity" text,
    "Allowed recipients" text
)
SELECT "Children per donor" FROM table_20603 WHERE "Allowed recipients" = 'no data'
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: List the possible children per donor levels for countries where the allowed recipients is no data. ### Input: CREATE TABLE table_20603 (
    "Country" text,
    "Donor payment" text,
    "Children per donor" text,
    "Donor anonymity" text,
    "Allowed recipients" text
) ### Response: SELECT "Children per donor" FROM table_20603 WHERE "Allowed recipients" = 'no data'