Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_16991 ( "Marginal Ordinary Income Tax Rate" text, "Single" text, "Married Filing Jointly or Qualified Widow(er)" text, "Married Filing Separately" text, "Head of Household" text )

### Question ###
What is ithe range for married filing separately where head of household is $117,451 $190,200?

### Accurate SQL ###

SELECT "Married Filing Separately" FROM table_16991 WHERE "Head of Household" = '$117,451–$190,200'