Task: Question Answering
Input (English): Context: Ukraine (tr. ) is a sovereign state in Eastern Europe, bordered by Russia to the east and northeast, Belarus to the northwest, Poland and Slovakia to the west, Hungary, Romania, and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively. Ukraine is currently in territorial dispute with Russia over the Crimean Peninsula which Russia annexed in 2014 but which Ukraine and most of the international community recognise as Ukrainian. Including Crimea, Ukraine has an area of , making it the largest country entirely within Europe and the 46th largest country in the world. It has a population of about 44.5 million, making it the 32nd most populous country in the world., Rodion Oslyabya ( Russian :   ) was a Russian monk from Saint Sergius 's Trinity Abbey who became famous for his part in the Battle of Kulikovo . Most details of his life are legendary . According to a 15th - century source , he was a nobleman ( boyar ) rather than a monk . He fought in the Battle on Pyana River , in a rank of tysyachnik ( leader of a thousand knights ) , and survived the defeat . According to hagiography , he accepted vows just prior to Battle of Kulikovo . His relative ( some say brother ) was Alexander Peresvet , although it is likely that this relationship is merely the product of later hagiographic tradition . Oslyabya reportedly fought and survived the battle of Kulikovo , along with his son Yakov . There 's no certainty if he survived the battle . According to some accounts , he did , and later participated in a diplomatic mission to the Byzantine Emperor in 1398 . According to other accounts , he was killed in that battle . Oslyabya lies buried at the Theotokos Church in Simonovo , Moscow together with Peresviet . The Russian battleship Oslyabya was named after him ., A boyar was a member of the highest rank of the feudal Bulgarian, Kievan, Moscovian, Wallachian and Romanian aristocracies, second only to the ruling princes (in Bulgaria, tsars), from the 10th century to the 17th century. The rank has lived on as a surname in Russia, Ukraine and Romania, and also in Finland, where it is spelled "Pajari"., Romania is a sovereign state located in Southeastern Europe. It borders the Black Sea, Bulgaria, Ukraine, Hungary, Serbia, and Moldova. It has an area of and a temperate-continental climate. With 19.94 million inhabitants, the country is the seventh-most-populous member state of the European Union. The capital and largest city, Bucharest, with its 1,883,425 inhabitants is the sixth-largest city in the EU., Alexander Peresvet, also spelled "Peresviet" (Russian:  ), was a Russian Orthodox Christian monk who fought in a single combat with the Tatar champion Temir-murza (known in most Russian sources as Chelubey or Cheli-bey) at the opening of the Battle of Kulikovo (8 September 1380), where they killed each other., Subject: oslyabya, Relation: date_of_death, Options: (A) 1 (B) 1380 (C) 19 (D) 2014 (E) 44 (F) 8 (G) 8 september 1380
Output (English): 1380