Anchor: Room 17: Canaletto's hugely popular 18th-century vedute (views) of Venice were aristocratic precursors of modern postcards; in such works as Island of San Giorgio Maggiore, Francesco Guardi achieved both poetry and melancholy.
Entailed: Canaletto's works were the 18-century version of a modern postcard.
Contradiction: Despite the beauty of Canaletto's works, they never became popular. 
Contradiction: The dog is hunting a bird in a forest.
Contradiction: There are usually a lot of lounge chairs on the beach.
Contradiction: A child is sick in bed.
Contradiction: He swung the hammer, despite the fact it weighed about 15 stones.