Anchor: a large black dog chases a small black dog.
Entailed: Two dogs chase each other
Contradiction: a large brown dog chases a small black dog.
Contradiction: The plaza and torchlight were very helpful for hearing and seeing. 
Contradiction: Some villagers in Roussillon own their own horses.
Contradiction: Lots of people on a escalator in an old fancy building for an event.
Contradiction: People are walking