Text: For centuries, the clock tower has been every Venetians favorite rendezvous point, an arched ground-level entranceway leading to the Merceria, a narrow zig-zagging boutique-lined street that cuts through this ancient quarter on its way north to the Rialto Bridge.
Entailment: The Rialto Bridge is north of the Merceria.
Contradiction: Venetians avoid meeting at or near the clock tower.