Anchor: They rode in single file down the path leading to the village.
Entailed: They were riding in single file towards the village. 
Contradiction: They were riding double file towards the village. 
Contradiction: The men are walking their cats on the sidewalk.
Contradiction: Three people riding bikes past a bus stop.
Contradiction: I did not hear him but I could see him.  
Contradiction: There is no need to take sides while visiting.