What is the country where there are 8 children per donor and no data for donor payments?
CREATE TABLE "table1_16175217_1" (
  "country" text,
  "donor_payment" text,
  "children_per_donor" text,
  "donor_anonymity" text,
  "allowed_recipients" text
);
SELECT "country" FROM "table1_16175217_1" WHERE "children_per_donor"='8 children' AND "donor_payment"='no data';