Anchor: An older boy chases a laughing younger boy on the grass.
Entailed: there are boys outdoors
Contradiction: boys playing basketball
Contradiction: The ferry from Eminene passes the Eiffel Tower, perched on a large island.
Contradiction: Even after nine years, the Buick was still going strong. 
Contradiction: One man lives alone in the sewers.
Contradiction: A girl is sitting on some steps.