Anchor: A group of young people getting ready to scuba dive off the back of a boat in the ocean.
Entailed: A group of people are about to scuba dive.
Contradiction: A group of old people are about to snorkel.
Contradiction: A group of people are sitting at a dinner table.
Contradiction: There are people on a carnival ride.
Contradiction: The gentleman is beyond charming. 
Contradiction: There are no two columns that are the same.