Who was asked 20 questions in the issue where the centerfold is Marliece Andrada?
CREATE TABLE "table1_1566850_9" (
  "date" text,
  "cover_model" text,
  "centerfold_model" text,
  "interview_subject" text,
  "20_questions" text,
  "pictorials" text
);
SELECT "20_questions" FROM "table1_1566850_9" WHERE "centerfold_model"='Marliece Andrada';