Question: Which body of water is by Viktor Polyakov's birthplace?

full_context: Document 1: Vladyslav Ohirya: He is product of LVUFK youth sportive system, where he trained together with Denys Harmash. He spent time with some Ukrainian teams that played in the Ukrainian First League, but belonged to the Ukrainian Premier League FC Zorya Luhansk. He made his debut for FC Zorya as substituted player in the game against FC Karpaty Lviv on 8 August 2009 in the Ukrainian Premier League.
Document 2: Tura River: The Tura River (), also known as Dolgaya River (Long River, ) is a historically important Siberian river which flows eastward from the central Ural Mountains into the Tobol River, a part of the Ob River basin. The main town on it is Tyumen.
Document 3: Leninsky City District, Perm: Leninsky City District () is one of the seven city districts of the city of Perm in Perm Krai, Russia. Population: It is the least populous city district of Perm.
Document 4: Volodymyr Kravets: Volodymyr Kravets (born May 31, 1981 in Krasnoarmiisk, Donetsk Oblast) is a male boxer from Ukraine, who competed for his Eastern European country at the 2004 Summer Olympics in Athens, Greece. There he was stopped in the first round of the men's lightweight division (– 60 kg) by Pakistan's Asghar Ali Shah.
Document 5: Ay River: Ay River (, ) is a river in Bashkortostan and Chelyabinsk Oblast in Russia, a left tributary of the Ufa River. The river is long, and its drainage basin covers . The Ay freezes up in late October or early November and remains icebound until mid-April. The cities of Zlatoust and Kusa are along the Ay River. Along the banks of the river, there are many steep cliff sides and caves. The current of the river has been used for hydroelectric power. It is also possible to fish for pike, bleak, and carp, to name a few species.
Document 6: Gornozavodsky District: Gornozavodsky District () is an administrative district (raion) of Perm Krai, Russia; one of the thirty-three in the krai. Municipally, it is incorporated as Gornozavodsky Municipal District. It is located on the western slopes of the Ural Mountains in the east of the krai. The area of the district is . Its administrative center is the town of Gornozavodsk. Population: The population of Gornozavodsk accounts for 46.3% of the district's total population.
Document 7: Zygmunt Chychła: Zygmunt Chychła (5 November 1926 in Gdańsk - 26 September 2009 in Hamburg) was a Polish boxer. He won the first post-World War II Olympic gold medal for Poland.
Document 8: Viktor Polyakov: Viktor Lvovych Polyakov (born September 29, 1981 in Perm, Russia) is a boxer from Ukraine, who competed at the 2004 Summer Olympics in Athens, Greece.
Document 9: Chelyabinsk: Chelyabinsk () is a city and the administrative center of Chelyabinsk Oblast, Russia, located in the northeast of the oblast, south of Yekaterinburg, just to the east of the Ural Mountains, on the Miass River, on the border of Europe and Asia. Population:
Document 10: Krasnovishersky District: Krasnovishersky District () is an administrative district (raion) of Perm Krai, Russia; one of the thirty-three in the krai. Municipally, it is incorporated as Krasnovishersky Municipal District. It is located in the northeast of the krai, in the valley of the Vishera River, and borders with the Komi Republic in the north, Sverdlovsk Oblast in the east, Cherdynsky District in the west, Solikamsky District in the south, and with the territory of the town of krai significance of Alexandrovsk in the southeast. The area of the district is . Its administrative center is the town of Krasnovishersk. Population: The population of Krasnovishersk accounts for 71.4% of the district's total population.
Document 11: Perm: Perm (;) is a city and the administrative centre of Perm Krai, Russia, located on the banks of the Kama River in the European part of Russia near the Ural Mountains.
Document 12: Vadym Lepskyy: Lepskyy competed for the Ukrainian team in a medley double at the 2008 Summer Olympics in Beijing. Leading up to the Games, he cleared FINA B-standard entry times of 2:02.94 (200 m individual medley) and 4:21.16 (400 m individual medley) at the Multinations Swim Meet in Prague, Czech Republic. On the first day of the Games, Lepskyy cruised to sixth place in the final heat and twentieth overall by thirteen seconds behind U.S. swimmer and all-time Olympian Michael Phelps (4:07.82) in 4:20.96. In the 200 m individual medley, Lepskyy challenged seven other swimmers on the second heat, including two-time Olympian and California Bears swimmer Miguel Molina of the Philippines. He raced to third place by 0.12 of a second behind Molina with a time of 2:01.73. Lepskyy failed to advance into the semifinals, as he placed twenty-eighth overall in the preliminaries.
Document 13: Georgios Stefanopoulos: Georgios Stefanopoulos (; born March 31, 1962 in Peristeri, Attiki) is a former boxer from Greece, who participated in two Summer Olympics for his native country in the men's heavyweight division (– 91 kg), starting in 1984 in Los Angeles, California. He twice won a medal at the European Championships in the early 1990s. Georgios also had some success in kickboxing, winning a gold medal in the Full-Contact heavyweight category at the W.A.K.O. European Championships 1986.
Document 14: Ivan Alexeyevich Polyakov: Ivan Alexeyevich Polyakov (1886-1969) was a Cossack military leader who fought in World War I (on the Russian side), and in World War II (on the German side).
Document 15: Serhiy Yakovych Shevchenko: Sergei Shevchenko is a former Soviet and Ukrainian striker, the champion of Ukraine with SC Tavriya Simferopol, and a Kazakh coach.
ground_truth: Kama River
sub_queries: Viktor Polyakov >> place of birth Answer: Perm
Which is the body of water by Perm ? Answer: Kama River