CREATE TABLE "commemorative_silver_dollar_series" (
  "year" real,
  "theme" text,
  "artist" text,
  "mintage_proof" text,
  "issue_price_proof" text,
  "mintage_bu_clarification_needed" text,
  "issue_price_bu_clarification_needed" text
);

Question: What is the issue price (proof) where the issue price (bu) is 34.95?
SQL: SELECT "issue_price_proof" FROM "commemorative_silver_dollar_series" WHERE "issue_price_bu_clarification_needed"='34.95';

Question: What is the earliest year where the mintage (proof) is 25,000?
SQL: SELECT MIN("year") FROM "commemorative_silver_dollar_series" WHERE "mintage_proof"='25,000';

Question: What is the mintage (bu) with the artist Royal Canadian Mint Staff and has an issue price (proof) of $54.95?
SQL: SELECT "mintage_bu_clarification_needed" FROM "commemorative_silver_dollar_series" WHERE "artist"='Royal Canadian Mint Staff' AND "issue_price_proof"='$54.95';

Question: What is the year that the issue price (bu) is $26.95?
SQL: SELECT "year" FROM "commemorative_silver_dollar_series" WHERE "issue_price_bu_clarification_needed"='$26.95';