Q: Information: - Rurik Rostislavich ( Russian : ) ( ? -- 1215 ) , Prince of Novgorod ( 1170 -- 1171 ) , Belgorod Kievsky , presently Bilohorodka ( 1173 -- 1194 ) , Grand Prince of Kiev ( 1173 , 1180 -- 1182 , 1194 -- 1202 , 1203 -- 1205 , 1206 , 1207 -- 1210 ) , Prince of Chernigov ( 1210 -- 1214 ) . Rurik was the son of Rostislav I of Kiev , and succession conflicts placed Rurik on the throne of the Kievan Rus ' no less than seven times . In 1182 , he became co-ruler with Sviatoslav III of Kiev , an arrangement that lasted until Sviatoslav 's death in 1194 . Rurik ruled alone until 1199 , when his rule was challenged by Roman the Great , who deposed Rurik . After a brief stint in Chernihiv , where he built the Church of St. Paraskebas , Rurik , along with his kinsmen and a Cuman army , attacked and sacked Kiev in 1203 , but was repelled until Roman 's death in 1205 . Rurik had been confined to a monastery in 1204 , but he abandoned his holy vows and returned to the throne . His cousin , Vsevolod , felt that Rurik 's previous monastic vows rendered his authority invalid , and so attacked and briefly seized Kiev in 1206 , 1207 , and 1211 . He succeeded in capturing Rurik , who died in captivity in Chernigov . Rurik was married to Anna of Turov ; among their children was Rostislav II of Kiev . - Kievan Rus' (, ) was a loose federation of East Slavic tribes in Europe from the late 9th to the mid-13th century, under the reign of the Rurik dynasty. The modern peoples of Belarus, Ukraine, and Russia all claim Kievan Rus' as their cultural ancestors. - Grand Prince of Kiev (sometimes Grand Duke of Kiev) was the title of the Kievan prince and the ruler of Kievan Rus' from the 10th to 13th centuries. In the 13th century, Kiev became an appanage principality first of the Grand Prince of Vladimir and the Golden Horde governors, and later was taken over by the Grand Duchy of Lithuania. After reading the paragraphs above, we are interested in knowing the entity with which 'rurik rostislavich' exhibits the relationship of 'noble family'. Find the answer from the choices below. Choices: - rurik - rurik dynasty
A: rurik dynasty

Q: Information: - Karl Marx (5 May 1818 14 March 1883) was a German-born scientist, philosopher, economist, sociologist, journalist, and revolutionary socialist. Born in Trier to a middle-class family, he later studied political economy and Hegelian philosophy. As an adult, Marx became stateless and spent much of his life in London, England, where he continued to develop his thought in collaboration with German thinker Friedrich Engels and published various works, the most well-known being the 1848 pamphlet "The Communist Manifesto". His work has since influenced subsequent intellectual, economic, and political history. - Friedrich Engels (or 28 November 1820 5 August 1895) was a German philosopher, social scientist, journalist, and businessman. He founded Marxist theory together with Karl Marx. In 1845, he published "The Condition of the Working Class in England", based on personal observations and research in Manchester. - Marxism is a method of socioeconomic analysis that analyzes class relations and societal conflict using a materialist interpretation of historical development and a dialectical view of social transformation. It originates from the mid-to-late 19th century works of German philosophers Karl Marx and Friedrich Engels. - Vladimir Viktorovich Adoratsky ( 1878 -- 1945 ) was a Soviet communist historian and political theorist . In 1920 , he became assistant manager of the Central Archives Board , and in 1932 a member of the Academy of Sciences of the USSR . He wrote a number of works on the Marxist theory of the state and law , and on the philosophy and history of Marxism . After reading the paragraphs above, we are interested in knowing the entity with which 'vladimir adoratsky' exhibits the relationship of 'occupation'. Find the answer from the choices below. Choices: - economist - philosopher - scientist - social scientist - socialist - sociologist
A: philosopher