user: Question: What is the range of married filing jointly or qualified widower in which married filing separately is $33,951–$68,525?
Columns: ['Marginal Ordinary Income Tax Rate', 'Single', 'Married Filing Jointly or Qualified Widow(er)', 'Married Filing Separately', 'Head of Household']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['10%', '$0–$8,350', '$0–$16,700', '$0–$8,350', '$0–$11,950']
SQL:

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