Question: Who is the president of the senate in the country Yellow Yeiyah was in?

full_context: Document 1: The Gambia at the 2008 Summer Olympics: Gambia took part in the 2008 Summer Olympics, held in Beijing, China from 8 to 24 August 2008. It was Gambia's seventh appearance in the summer Olympics since its debut in 1984. The Gambia team included three athletes; runners Suwaibou Sanneh and Fatou Tiyana as well as boxer Badou Jack. Jack, a middleweight at his first Olympics, was selected as flag bearer for both the opening and closing ceremonies. None of the Gambia athletes progressed further than the qualifying heats.
Document 2: Georgia State Senate: The presiding officer of the Senate is the President of the Senate. A President Pro Tempore, usually a high - ranking member of the majority party, acts as President in case of the temporary disability of the President. In case of the death, resignation, or permanent disability of the President or in the event of the succession of the President to the executive power, the President Pro Tempore becomes President. The Senate also has as an officer the Secretary of the Senate.
Document 3: Somalia at the 2008 Summer Olympics: Somalia sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. The country's participation at Beijing marked its seventh in the Summer Olympics since its debut in 1972 Games. The delegation included two track and field athletes: sprinter Samiya Yuusf Omar and long-distance runner Abdinasir Said Ibrahim. Neither athlete progressed past the first round of their respective competitions. Omar's story, having trained in Mogadishu during the Somali Civil War, was covered by the media at the time, and later featured in a graphic novel following her death.
Document 4: Yellow Yeiyah: Yellow Yeiyah, last names also seen as two words "Yei Yah", (born 9 September 1984 in Ondo, Nigeria) is an Olympic swimmer from Nigeria. He swam for Nigeria at the 2008 Olympics.
Document 5: President of the Senate of Nigeria: The President of the Senate is the presiding officer of the Senate of Nigeria, elected by its membership. The Senate President is second in line for succession to the Nigerian presidency, after the Vice President of Nigeria. The current President of the Senate is Bukola Saraki.
Document 6: Vice President of Nigeria: The Vice President of Nigeria is the second - in - command to the President of Nigeria in the Government of Nigeria. Officially styled Vice President of the Federal Republic of Nigeria, the Vice President is elected alongside the President in national elections. The office is currently held by Yemi Osinbajo.
Document 7: Elaine Chan (swimmer): Elaine Chan Yu Ning (; born March 15, 1988) is a two-time Olympic swimmer from Hong Kong, specialized in freestyle events. At age sixteen, Chan first competed at the 2004 Summer Olympics in Athens, where she finished forty-seventh in the women's 50 m freestyle, with a time of 27.48 seconds. Following her remarkable performance at the Olympics, Chan granted a full scholarship to the Ohio State University in Columbus, Ohio, where she trained with the college swimming team for 18 months. In 2007, Chan returned to Hong Kong to pursue her education with a bachelor's degree in economics and finance at the University of Hong Kong, while she trained with the national team in preparation for the Olympics. She qualified for the 2008 Summer Olympics in Beijing, and competed for the second time in women's 50 m freestyle. She swam in the seventh heat of the competition, with a time of 26.54 seconds, bettering her personal best from the previous Olympics, but finishing only in forty-fourth place.
Document 8: Deputy President of the Nigerian Senate: Deputy Senate Presidents of Nigeria Deputy Senate President Term Party Ibrahim Mantu 1999 - 2007 PDP Ike Ekweremadu 2007 - present PDP
Document 9: Age of candidacy: In Nigeria, a person must be at least 35 years of age to be elected President or Vice President, 30 to be a Senator or State Governor, and 25 to be a Representative in parliament.
Document 10: Nigeria: Nigeria is a Federal Republic modelled after the United States, with executive power exercised by the president. It is influenced by the Westminster System model[citation needed] in the composition and management of the upper and lower houses of the bicameral legislature. The president presides as both Head of State and head of the national executive; the leader is elected by popular vote to a maximum of two 4-year terms. In the March 28, 2015 presidential election, General Muhammadu Buhari emerged victorious to become the Federal President of Nigeria, defeating then incumbent Goodluck Jonathan.
Document 11: 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 12: Sikhounxay Ounkhamphanyavong: Described as "the big name of Laotian swimming", he represented his country at the 2000 Summer Olympics in Sydney, in the men's 50 metre freestyle. He had trained in one of the world's poorest countries, "where the largest pool is 25 meters long – half the Olympic distance". A reporter for the Australian Broadcasting Corporation noted that "a 25m pool badly in need of cleaning is [his] only place to train." Ounkhamphanyavong finished last in his heat, with a time of 27.03, and did not advance to the semi-finals.
Document 13: United States Senate: The presiding officer of the Senate is the Vice President of the United States, who is President of the Senate. In the Vice President's absence, the President Pro Tempore, who is customarily the senior member of the party holding a majority of seats, presides over the Senate. In the early 20th century, the practice of majority and minority parties electing their floor leaders began, although they are not constitutional officers.
Document 14: Yang Yu (swimmer): Yang Yu (; born February 6, 1985 in Hangzhou, Zhejiang) is a female Olympic medal-winning swimmer from the People's Republic of China. She became part of the Chinese national swimming team in 1999, and competed for Team China at the 2008 Summer Olympics.
Document 15: Haider Nawzad: He and his rowing partner, Hamza Hussein, qualified for the men's double sculls event at the 2008 Summer Olympics in Beijing through a Tripartite Commission invitation. They were last-minute qualifiers for the Beijing Games, obtaining a place when North Korea declined an invitation to send rowers, and the invitation was reallocated to Iraq. They are two of only four competitors on the 2008 Iraqi Olympic team. Nawzad and Hussein train on the Tigris river in central Baghdad. Nawzad was living in Sweden, but returned to Iraq to train for the Olympics.
ground_truth: Bukola Saraki
sub_queries: What country was Yellow Yeiyah in? Answer: Nigeria
who is the president of the senate in Nigeria Answer: Bukola Saraki