Anchor: These women are skating in the roller derby.
Entailed: Women are skating in a roller derby match.
Contradiction: Women are riding skateboards in the alleyway.
Contradiction: Susan was washing the dishes.
Contradiction: The area's fine history can still be seen even though it as a whole has fallen into decay. 
Contradiction: A man is drinking alone in a bar.
Contradiction: A group of kids play sports indoors