What is ithe range for married filing separately where head of household is $117,451–$190,200?
CREATE TABLE "regular_and_capital_gains_tax_rates_for_" (
  "marginal_ordinary_income_tax_rate" text,
  "single" text,
  "married_filing_jointly_or_qualified_widow_er" text,
  "married_filing_separately" text,
  "head_of_household" text
);
SELECT "married_filing_separately" FROM "regular_and_capital_gains_tax_rates_for_" WHERE "head_of_household"='$117,451–$190,200';