Anchor: Four dark-skinned people in tribal clothing walk in different directions in front of a cluster of large grass huts.
Entailed: There are people in tribal clothing.
Contradiction: The people are light-skinned.
Contradiction: He works in the light and absolutely trusts everyone. 
Contradiction: A woman and her child is around other women with children
Contradiction: A woman drives a semi.
Contradiction: No particular emphasis was devoted to the idea that case studies are inexpensive to conduct.