Anchor: People stand against a wall, one guy wears headphones.
Entailed: The man was using headphones.
Contradiction: Everyone is dancing.
Contradiction: Each doctor visit was $1 and each prescription was $5.
Contradiction: The rule is in place to regulate exhaust emissions for new spark-ignition (SI) gasoline marine engines. The rule applies to models made in the year 1998 and onwards. The rule has been fully phased-in by the 2006 model year. 
Contradiction: The men are performing on a large stage in an arena.
Contradiction: Instructive points of clarification were encouraged in the group.