Anchor: Five construction workers are working on the frame of a building with three of them leaning against the railing.
Entailed: Five workers worked on the building frame.
Contradiction: The workers worked on the building windows.
Contradiction: It sounds boring, I don't wanna go. 
Contradiction: There are two people floating in an innertube.
Contradiction: Me and my friend stay home and play Xbox all night long. 
Contradiction:  GPRA seeks to address such situations