Anchor: He hadn't paid too much attention, but the slaves seemed to be from every possible background.
Entailed: He did not notice the various backgrounds of the slaves.
Contradiction: The slaves were all from the same country.
Contradiction: Such evidence can never be found no matter the effort made. 
Contradiction: Some men are standing outside
Contradiction: A man wearing purple looks away while a woman in orange grins at the camera.
Contradiction: two men are riding skateboards