CREATE TABLE "specimen_set_variant_dollars" (
  "year" real,
  "theme" text,
  "artist" text,
  "mintage" text,
  "issue_price" text
);

Question: What was the issue price for the Trumpeter Swan set?
SQL: SELECT "issue_price" FROM "specimen_set_variant_dollars" WHERE "theme"='trumpeter swan';

Question: Who was the artist with a mintage of 40,000 and an issue price of $45.95?
SQL: SELECT "artist" FROM "specimen_set_variant_dollars" WHERE "mintage"='40,000' AND "issue_price"='45.95';