Question: Who is the president of the senate in the country where Anthony Ukpo was from?

full_context: Document 1: 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 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: Dangiwa Umar: Colonel (retired) Abubakar Dangiwa Umar (born 1949) was governor of Kaduna state in Nigeria from August 1985 to June 1988 during the military regime of General Ibrahim Babangida.
Document 4: Anthony Ukpo: Stephen Anthony Ukpo (born 16 July 1947) was Minister of Information and Culture, and then Governor of Rivers State, Nigeria from August 1986 until July 1988 during the military administration of General Ibrahim Babangida.
Document 5: 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 6: 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 7: Aminu Isa Kontagora: Colonel Aminu Isa Kontagora was Administrator of Benue State, Nigeria from August 1996 to August 1998 during the military regime of General Sani Abacha, then Administrator of Kano State from September 1998 to May 1999 during the transitional regime of General Abdulsalami Abubakar, handing over power to the elected executive governor Rabiu Musa Kwankwaso on 29 May 1999.
Document 8: 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 9: Eben Ibim Princewill: Navy Captain Eben Ibim Princewill was Military Governor of Cross River State, Nigeria between 1986 and December 1989 during the military regime of General Ibrahim Babangida.
Document 10: 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 11: List of Governors of Abia State: Name Title Took Office Left Office Party Notes Frank Ajobena Military Administrator * August 28, 1991 January, 1992 None Ogbonnaya Onu Executive Governor January, 1992 November, 1993 NRC Chinyere Ike Nwosu Military Administrator * December 9, 1993 September 14, 1994 None Temi Ejoor Military Administrator * September 14, 1994 August 22, 1996 None Moses Fasanya Military Administrator * August 22, 1996 August, 1998 None Anthony Obi Military Administrator * August, 1998 May 29, 1999 None Orji Uzor Kalu Executive Governor May 29, 1999 May 29, 2007 PDP, PPA Elected on PDP platform, switched to Progressive Peoples Alliance (PPA). Theodore A. Orji Executive Governor May 29, 2007 May 29, 2015 PPA Okezie Ikpeazu Executive Governor May 29, 2015 Incumbent PDP
Document 12: Mike Attah: Colonel Mike E. Attah was the Military Administrator of Anambra State in Nigeria from 9 December 1993 to 21 August 1996 during the military regime of General Sani Abacha.
Document 13: Ernest Olawunmi Adelaye: Group Captain Ernest Olawunmi Adelaye was appointed military governor of Rivers State, Nigeria from July 1988 to August 1990 during the military regime of General Ibrahim Babangida.
Document 14: Ibrahim Bio: Alhaji Isa Ibrahim Bio (born April 1957) was appointed by President Umaru Yar'Adua as Nigeria's Minister of Transportation on 17 December 2008.
Document 15: 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.
ground_truth: Bukola Saraki
sub_queries: Which country was Anthony Ukpo in? Answer: Nigeria
who is the president of the senate in Nigeria Answer: Bukola Saraki