Text: In the mosque's courtyard, there is a 7-m (22-ft) Iron Pillar, from the fourth century, brought here by the Rajput founders of Dhillika, but nobody knows from where.
Entailment: The Iron Pillar in the mosque's courtyard is more than a thousand years old.
Contradiction: It is unknown by whom the Iron Pillar was brought into the mosque's courtyard.