Anchor: Five people are snorkeling in the still, clear, shallow waters.
Entailed: The people are snorkeling.
Contradiction: There are 3 people.
Contradiction: A man riding his bike through the park
Contradiction: A female runner leads a pack of people dressed in togas and warrior costumes.
Contradiction: This was a horrible conversation, never call me again. 
Contradiction: This missive details our estimation of how well HUD has met the requirements.