Anchor: Beaches come in all sizes, from the tiny cove where you can spend the day alone, to wide sandy bays where you can be sure of the company of hundreds.
Entailed: You can find different sized beaches, from tiny to large. 
Contradiction: There exist only big beaches and not small ones.
Contradiction: The couple hasn't been out lately.
Contradiction: A girl working on artwork sits around.
Contradiction: the cats are eating
Contradiction: A risk in using other people's studies are concerns.