Text: The oldest cannon is the Seri Rambai; originally given to the Sultan of Jahor by the Dutch, it was transported to Penang in the 17th century aboard a British steamer of the same name.
Entailment: Seri Rambai is the oldest cannon; it was originally given to the Sultan of Jahor by the Dutch.
Contradiction: The oldest cannon is unknown, and there's no trace left of it.