Question: Sir John Oldcastle, was an English Lollard leader, he escaped from which historic castle located on the north bank of the River Thames in central London, and it lies within the London Borough of Tower Hamlets?
Sentence (from "Tower of London"): The Tower of London, officially Her Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle located on the north bank of the River Thames in central London.
Relevant evidence: Yes