Please answer this: Information:  - Nordic combined is a winter sport in which athletes compete in cross-country skiing and ski jumping. Nordic combined at the Winter Olympics and the FIS Nordic Combined World Cup are ongoing.  - The FIS Nordic Combined World Cup is a Nordic combined competition organized yearly by FIS, representing the highest level in international competition for this sport. It was first arranged for the 1983/84 season. Team event was first time held in 1999/00 season. The FIS race director is a Norwegian ex ski jumper and ex world record holder Lasse Ottesen.  - Yuji Katsuro ( born October 7 , 1949 ) was a Japanese nordic combined skier who competed in the 1970s . His best finish at the Winter Olympics was fifth in the Nordic combined event at Sapporo in 1972 .    Given the information, choose the subject and object entities that have the relation of 'occupation'.
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Answer: yuji katsuro , ski jumper


Please answer this: Information:  - A mathematician is someone who uses an extensive knowledge of mathematics in his/her work, typically to solve mathematical problems.  - The Tournament of the Towns ("International Mathematics Tournament of the Towns", " ", "   ") is a town-based mathematics contest originating in Russia. The contest was created by mathematician Nikolay Konstantinov and has participants from over 100 cities in many different countries.  - Paul Erds (; 26 March 1913  20 September 1996) was a Hungarian mathematician. He was one of the most prolific mathematicians of the 20th century. He was known both for his social practice of mathematics (he engaged more than 500 collaborators) and for his eccentric lifestyle ("Time" magazine called him "The Oddball's Oddball"). He devoted his waking hours to mathematics, even into his later yearsindeed, his death came only hours after solving a geometry problem in a conference in Warsaw.  - Nikolay Nikolayevich Konstantinov ( Russian :    ; born 2 January 1932 ) is a leading Soviet and Russian mathematical educator and organizer of numerous mathematics competitions for high school students . He is best known as the creator and chief organizer of the Tournament of the Towns . For his work he was awarded the Paul Erds award in 1992 .  - 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.    Given the information, choose the subject and object entities that have the relation of 'occupation'.
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Answer:
nikolay konstantinov , mathematician