Task: Question Answering
Input (English): Passage: Warbeck was initially treated well by Henry. As soon as he confessed to being an impostor, he was released from the Tower of London, and was given accommodation at Henry's court. He was even allowed to be present at royal banquets. He was, however, kept under guard and was not allowed to sleep with his wife, who was living under the protection of the queen. After 18 months at court, Warbeck tried to escape. He was quickly recaptured. He was then held in the Tower, initially in solitary confinement, and later alongside Edward Plantagenet, 17th Earl of Warwick; the two tried to escape in 1499. Captured once again, Warbeck was led from the Tower to Tyburn, London on 23 November 1499, where he read out a confession and was hanged. The Earl of Warwick was beheaded on Tower Hill on 28 November 1499. Warbeck was buried in Austin Friars, London. The presumed site of his unmarked grave still exists as the Dutch Church, Austin Friars. 
Question: How many times did Warbeck try to escape? 
Answer type: Number 
Output (English): 2.