Anchor: Adrin smiled and Jon smiled back.
Entailed: Adrin and Jon smiled at each other.
Contradiction: Adrin and Jon ignored each other. 
Contradiction: Tadeusz Koaciuszko used an army of nobles to beat the Russians.
Contradiction: A man and a dog are performing.
Contradiction: If we don't have unselfish leadership, we will have success.
Contradiction: Girls are sitting down.