Text: Begun by Delhi's first sultan, Qutb-ud-din, and completed by his son-in-law Iltutmish, the 73-m (240-ft) tower was erected to celebrate the Turkish conquest of Delhi.
Entailment: The tower is a monument built in remembrance of Delhi's conquest by the Turks.
Contradiction: Begun by the first sultan of Delhi, the tower was never finished.