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: (CNN) -- Tokyo has been chosen by the International Olympic Committee to host the 2020 Summer Games. In voting Saturday in Buenos Aires, the committee picked Tokyo over the two other contenders, Madrid and Istanbul. The announcement came at 5:20 a.m. Tokyo time, but a large crowd watching on an outdoor video screen burst into cheers. Tokyo previously hosted the Summer Games in 1964. Japan's bid for 2020 billed the city as the safe choice -- despite radiation leaking from the Fukushima nuclear plant. Prime Minister Shinzo Abe personally made a presentation to the committee and promised an effective cleanup.Celebrations in Japan after winning 2020 votePrime Minister Shinzo Abe expresses his joy at IOC decisionJapan is still battling image of Fukushima disasterIstanbul would have been first Muslim country to host the Olympic Games 
 Question:Abe said Tokyo would try to stage a successful Games to thank the world for its support after the 2011 earthquake and tsunami that devastated parts of _.

Japan