What is the novel that has a valid status, located in Mongolia, and named Prenocephale?
CREATE TABLE "newly_named_dinosaurs" (
  "name" text,
  "novelty" text,
  "status" text,
  "authors" text,
  "location" text
);
SELECT "novelty" FROM "newly_named_dinosaurs" WHERE "status"='valid' AND "location"='mongolia' AND "name"='prenocephale';