Text: The massive brick fortress, the Cetello Sforzesco, northwest of the city center, was originally built by the Visconti and later rebuilt in its present form in the 15th century by Duke Francesco Sforza.
Entailment: The Cetello Sforzesco was originally built by the Visconti.
Contradiction: The Cetello Sforzesco was originally built by the Visconti and was never rebuilt.