Task: Question Answering
Input (English): Context: Russia (from the  Rus'), also officially known as the Russian Federation, is a country in Eurasia. At , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 140 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern, about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world, other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod and Samara., Ivan V Alekseyevich ( Russian :  V  , 6 September ( O.S. 27 August ) 1666 -- 8 February ( O.S. 29 January ) 1696 ) was a joint Tsar of Russia ( with his younger half - brother Peter I ) who co-reigned between 1682 and 1696 . He was the youngest son of Alexis I of Russia and Maria Miloslavskaya . His reign was only formal , since he had serious physical and mental disabilities . He sat still for hours at a time and needed assistance in order to walk ., Maria Ilyinichna Miloslavskaya (16251669) was a Russian tsaritsa as the first spouse of tsar Alexis of Russia. She was the mother of tsar Feodor III of Russia, tsar Ivan V of Russia, and the princess regent Sophia Alekseyevna., Saint Petersburg is Russia's second-largest city after Moscow, with five million inhabitants in 2012, and an important Russian port on the Baltic Sea. It is politically incorporated as a federal subject (a federal city). Situated on the Neva River, at the head of the Gulf of Finland on the Baltic Sea, it was founded by Tsar Peter the Great on May . In 1914, the name was changed from Saint Petersburg to Petrograd, in 1924 to Leningrad, and in 1991 back to Saint Petersburg. Between 17131728 and 17321918, Saint Petersburg was the imperial capital of Russia. In 1918, the central government bodies moved to Moscow., Subject: ivan v of russia, Relation: father, Options: (A) alexis of russia (B) include (C) peter the great
Output (English): alexis of russia