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]: An Australian gym junkie waging war on the Islamic State in the Middle East has become something of a personal trainer for a team of aspiring weightlifters. Brisbane bench-press champion Ashley Dyball, 23, joined up with a Kurdish fighter group in May in an effort to 'liberate women and children' from Islamic State's sadistic clutches. And last week Mr Dyball - known as 'Sweetie Boy' to his fellow warriors - took a break from the frontlines to teach a group of aspiring weightlifters his favourite training techniques. The young weightlifting fanatics even picked up a popular phrase used in Australian powerlifting circles from their new instructor: 'do you even lift, bro? '.Australian bench-press champion is waging war on ISIS in the Middle EastAshley Dyball, 23, from Brisbane, turned personal trainer at a recent rest stopMr Dyball taught aspiring local powerlifters his favourite techniques, he saidThey even picked up the phrase 'do you even lift, bro' from Mr Dyball 
 Question:From bathing in refrigerators to dodging airstrikes and losing beloved friends to the terror of war, life appears a far cry from his previous existence in _, which he has in the past described as easy-going.
[EX A]: Brisbane

[EX Q]: A primary school has cancelled a trip to take youngsters sightseeing in London because of fears over an attack from ISIS fanatics on the capital. Year 5 pupils at St James' CE Academy in Hull, East Yorks, were due to visit the city but staff decided it was too dangerous. The trip was cancelled following Parliament's decision to begin air strikes on Syria and an alleged terrorist incident at an east London Tube station earlier this month. The school said eight concerned parents had already withdrawn their children from the visit and that the decision was in their best interests.St James' CE Academy, in Hull, were due to take children sightseeingSchool cancelled trip following alleged attack on Leytonstone Tube stationHead said eight parents had already pulled their children out of excursionSchool said decision was not 'taken lightly' and trip has been postponed 
 Question:Jane Daniels, headteacher at the school, said: 'The decision to cancel our Year 5 children's visit to _ has not been taken lightly.
[EX A]:
London