Question: What was the issue price for the Trumpeter Swan set?
SQL: SELECT "Issue Price" FROM "2-11916083-28" 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 "2-11916083-28" WHERE "Mintage" = '40,000' AND "Issue Price" = '45.95';