Definition: 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].
Input: Police in Sweden are investigating chilling letters posted through letterboxes across the country threatening to behead people unless they convert to Islam. The notes, which are signed ISIS and carry the terrorist organisation's flag, threaten to decapitate 'non-believers' unless they become a Muslim or pay a religious tax. They have been distributed among several cities including Stockholm and warn 'the police will not save you from being murdered'. Translated, the notes said: 'In the name of Allah, the merciful, full of grace. You who are not believers will be decapitated in three days in your own house. We will bomb your rotten corpses afterwards.Threatening 'Isis notes' posted through letterboxes across SwedenSaid people would be decapitated if they didn't convert to IslamPolice and Swedish intelligence investigating credibilityFor more of the latest Islamic State news visit www.dailymail.co.uk/isis 
 Question:_ radio stations reported police were investigating the new threats and comparing them to previous warnings of violence.

Sweden