In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

[EX Q]: (CNN) Khuram Shahzad Butt, a 27-year-old British national born in Pakistan who died in a hail of police bullets Saturday night after the London attack, was a tall, lanky, straggly bearded young man of few words -- a brainwashed follower of al-Muhajiroun, a loose grouping of British extremists supportive of ISIS linked to a large number of terrorist plots involving UK nationals. The latest on London attack CNN's Sandi Sidhu met him several times while reporting on the group in the United Kingdom between 2014 and 2016. He went by the name "Abz" or "Abu Zaitun" and seldom spoke during meetings. He was content to leave the task of proselytizing to louder, older members of the group, according to Sidhu.London attacker Khuram Shahzad Butt appeared in a 2016 Channel 4 documentary called "The Jihadis Next Door"At the time of the attack, Butt worked as a receptionist at a fitness center in Ilford, a friend from the gym said 
 Question:The identification of Butt as one of the attackers raised many questions about what _ authorities knew about him and when.
[EX A]: British

[EX Q]: (CNN) -- A federal court on Monday sentenced a Somali man to 30 years in prison for acts related to high-seas piracy, according to a statement by the U.S. Attorney's office for the Eastern District of Virginia. "Today marks the first sentencing in Norfolk for acts of piracy in more than 150 years," U.S. Attorney MacBride said in the statement. "Piracy is a growing threat throughout the world, and today's sentence ... demonstrates that the United States will hold modern-day pirates accountable in U.S. courtrooms." Jama Idle Ibrahim pleaded guilty in federal court in August, admitting he had intended to seize a U.S. merchant vessel on April 10 and hold it for ransom.NEW: A Somali man is sentenced to 30 years in prison in high-seas piracy attemptJama Idle Ibrahim is one of a group of would-be pirates who were capturedHe has admitted to trying to seize a U.S. merchant vessel and hold it for ransomUntil this year, the last piracy-related conviction in the United States was in 1861 
 Question:Ibrahim and five other would-be pirates learned too late that they had instead pulled alongside a _.
[EX A]: U.S.

[EX Q]: Airlines have been forced to cancel another day of flights to Denpasar as volcanic ash continues to make its way over Bali's airspace. By 1pm, Jetstar had announced all of Thursday's flights to the holiday island had been stopped, assuring it would resume them as soon as the Volcanic Ash Advisory Centre deemed it safe to do so. Virgin has meanwhile cancelled all flights bound for Bali from Australia for both Thursday and Friday. The carrier said it would make a decision about resuming the flights headed to Australia from Denpasar midday Friday. 'Unfavourable winds have pushed the ash cloud close to Denpasar Airport over the last day and we're not satisfied it is safe to operate services in these conditions,' a statement from Jetstar said.Jetstar has called off all of Thursday's flights to the holiday islandVirgin has cancelled all flights bound for Bali for both Thursday and FridayThey will resume flights when Volcanic Ash Advisory Centre deems it safeIt comes as winds bring ash from the Mount Raung volcano over Denpasar 
 Question:Jestar customers have been urged to check the status of their flight on Jetstar.com before travelling to airports while _ is directing passengers to change their booking to another flight, which can be made at no extra charge in the next 14 days unless they prefer a full travel credit.
[EX A]:
Virgin