Text: A fine Scandinavian piano, a polyphone machine with disks, and a pianola were all used for dancing or recitals in the ballroom.
Entailment: Objects used in the ballroom for dancing or recitals included a fine Scandinavian piano, a pianola, and a polyphone machine with disks.
Contradiction: The ballroom was a place for quiet conversation, and no dancing or recitals were allowed.