Anchor: to pay equation for improved visibility (measured in deciviews) was developed as a function of the baseline level of visibility, the magnitude of the visibility improvement, and household income.
Entailed: Visibility is measured in deciviews.
Contradiction: Visibility is measured in centimeters.
Contradiction: I don't understand why he went over there for oil 
Contradiction: Road workers work near the railroad crossing
Contradiction: Tennis player breaking glasses
Contradiction: two girls doing flips while people watch