In which year were the authors or editors Delia Sherman?
CREATE TABLE "award_list" (
  "year" real,
  "author_s_or_editor_s" text,
  "book_title" text,
  "publisher" text,
  "category" text,
  "result" text
);
SELECT MAX("year") FROM "award_list" WHERE "author_s_or_editor_s"='Delia Sherman';