Text: Tucked behind Rua Joao Tavira and Rua da Carreira is Praca do Munic?­pio, the town's dignified main square, with a mosaic of black-and-white stones and pretty white buildings on three sides.
Entailment: There's a mosaic of black and white stones in the town's main square.
Contradiction: There are pretty white buildings situated in the town square but there are no black and white stones.