```html
SELECT FacSSN, FacLastName, FacDept
FROM Faculty
WHERE FacSSN IN
   (SELECT DISTINCT FacSSN FROM Offering 
      WHERE OffTerm = 'WINTER' 
        AND OffYear = 2006 );
```

I have a question which is meant for revision for an exam, This is the question:
List the name (first and last) and department of faculty who are only teaching in winter 
term 2006

However there is a person which has a lecture in winter 2006 and summer 2006, the question does not want to list that person