Anchor: A circular piece of architecture is in this city.
Entailed: A city has an architecture element that is in the shape of a circle.
Contradiction: There is a square statue in a city.
Contradiction: The claim I made in my article caused a ton of controversy.
Contradiction: two women are working
Contradiction: The question was easy and comfortable to answer, so I answered yes immediately. 
Contradiction: She is twelve years and rules the household.