Anchor: There is no wall, no natural choke point.
Entailed: There isn't a wall or a natural choke point.
Contradiction: There's a wall which we can use as a natural choke point.
Contradiction: The people are stretching
Contradiction: A dog is beneath some stairs.
Contradiction: Railway buffs will very much dislike the open air Rail Transport Museum.
Contradiction: A man in a coat standing in front of another person