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_16994 ( "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 the range of married filing jointly or qualified widower in which married filing separately is $33,951 $68,525?

### Accurate SQL ###

SELECT "Married Filing Jointly or Qualified Widow(er)" FROM table_16994 WHERE "Married Filing Separately" = '$33,951–$68,525'