Anchor: GAO already does a lot of case studies-or at least, what we ourselves call case studies in describing our methods.
Entailed: What we ourselves call case studies, GAO is already doing many of them. 
Contradiction: GAO has never done any sort of case study - at least, our definition of case studies.
Contradiction: A sewing group took a trip the fabric store together.
Contradiction: A boxer is working out.
Contradiction: A man and woman are taking a picture.
Contradiction: Our fields were taken away from us by them.