What is the long-term gain for commercial buildings with a short-term capital gain rate of 15%?
CREATE TABLE "regular_and_capital_gains_tax_rates_for_" (
  "ordinary_income_rate" text,
  "long_term_capital_gain_rate" text,
  "short_term_capital_gain_rate" text,
  "long_term_gain_on_commercial_buildings" text,
  "long_term_gain_on_collectibles" text
);
SELECT "long_term_gain_on_commercial_buildings" FROM "regular_and_capital_gains_tax_rates_for_" WHERE "short_term_capital_gain_rate"='15%';