Name the head of household that has married filing separately of $104,426–$186,475
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 "head_of_household" FROM "regular_and_capital_gains_tax_rates_for_" WHERE "married_filing_separately"='$104,426–$186,475';