Name the mens singles when womens singles is wang lin and mixed doubles is joachim fischer nielsen christinna pedersen
CREATE TABLE "winners" (
  "tour" text,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text,
  "mixed_doubles" text
);
SELECT "mens_singles" FROM "winners" WHERE "womens_singles"='Wang Lin' AND "mixed_doubles"='Joachim Fischer Nielsen Christinna Pedersen';