Question: Who is the president of the country where Stephen Worgu is a citizen?

full_context: Document 1: Nigeria: Since 2002, the North East of the country has seen sectarian violence by Boko Haram, an Islamist movement that seeks to abolish the secular system of government and establish Sharia law. Nigerian President Goodluck Jonathan in May 2014 claimed that Boko Haram attacks have left at least 12,000 people dead and 8,000 people crippled. At the same time, neighbouring countries, Benin, Chad, Cameroon and Niger joined Nigeria in a united effort to combat Boko Haram in the aftermath of a world media highlighted kidnapping of 276 schoolgirls and the spread of Boko Haram attacks to these countries.
Document 2: Nigeria: Ethnocentrism, tribalism, religious persecution, and prebendalism have affected Nigerian politics both prior and subsequent to independence in 1960. Kin-selective altruism has made its way into Nigerian politics, resulting in tribalist efforts to concentrate Federal power to a particular region of their interests. Nationalism has also led to active secessionist movements such as MASSOB, Nationalist movements such as Oodua Peoples Congress, Movement for the Emancipation of the Niger Delta and a civil war. Nigeria's three largest ethnic groups (Hausa, Igbo and Yoruba) have maintained historical preeminence in Nigerian politics; competition amongst these three groups has fuelled corruption and graft.
Document 3: Nigeria: According to a 2001 report from The World Factbook by CIA, about 50% of Nigeria's population is Muslim, 40% are Christians and 10% adhere to local religions. But in some recent report, the Christian population is now sightly larger than the Muslim population. An 18 December 2012 report on religion and public life by the Pew Research Center stated that in 2010, 49.3 percent of Nigeria's population was Christian, 48.8 percent was Muslim, and 1.9 percent were followers of indigenous and other religions, or unaffiliated. Additionally, the 2010s census of Association of Religion Data Archives has reported that 46.5 percent of the total population is Christian, slightly bigger than the Muslim population of 45.5 percent, and that 7.7 percent are members of other religious groups.
Document 4: Nigeria: Football is largely considered the Nigeria's national sport and the country has its own Premier League of football. Nigeria's national football team, known as the "Super Eagles", has made the World Cup on five occasions 1994, 1998, 2002, 2010, and most recently in 2014. In April 1994, the Super Eagles ranked 5th in the FIFA World Rankings, the highest ranking achieved by an African football team. They won the African Cup of Nations in 1980, 1994, and 2013, and have also hosted the U-17 & U-20 World Cup. They won the gold medal for football in the 1996 Summer Olympics (in which they beat Argentina) becoming the first African football team to win gold in Olympic Football.
Document 5: Niyi Ogunlana: Babatunde Niyi Ogunlana (born August 14, 1984 in Patako) is a former Nigerian football player, who was last playing for Kwara United F.C. of Ilorin.
Document 6: Nigeria: Nigeria is a religiously diverse society, with Islam and Christianity being the most widely professed religions. Nigerians are nearly equally divided into Christians and Muslims, with a tiny minority of adherents of Animism and other religions. According to one recent estimate, over 40% of Nigeria's population adheres to Islam (mainly Sunni, other branches are also present). Christianity is practised by 58% of the population (among them 74% are Protestant, 25% Roman Catholic, 1% other Christian). Adherents of Animism and other religions collectively represent 1.4% of the population.
Document 7: Stephen Worgu: Stephen Worgu (born 6 April 1990 in Brass, Nigeria) is a Nigerian footballer who plays for Bowsher Club in Oman.
Document 8: Nigeria: The vast majority of Muslims in Nigeria are Sunni belonging to Maliki school of jurisprudence; however, a sizeable minority also belongs to Shafi madhhab. A large number of Sunni Muslims are members of Sufi brotherhoods. Most Sufis follow the Qadiriyya, Tijaniyyah and/or the Mouride movements. A significant Shia minority exists (see Shia in Nigeria). Some northern states have incorporated Sharia law into their previously secular legal systems, which has brought about some controversy. Kano State has sought to incorporate Sharia law into its constitution. The majority of Quranists follow the Kalo Kato or Quraniyyun movement. There are also Ahmadiyya and Mahdiyya minorities.
Document 9: 2018 Ouagadougou attacks: In the aftermath of the 2011 Libyan Civil War, militant attacks have increased due to a large influx of weapons and fighters into the region. Neighbouring Mali faced conflict in Azawad that threatened to split the country. Since 2015, Burkina Faso has faced cross-border attacks and sporadic raids in its territory, the result of instability and unrest in neighboring countries. Two major attacks have occurred in the capital Ouagadougou in recent years: In 2016, attacks on a hotel and restaurant killed 30 people, including foreigners; and in 2017, similar attacks killed 19 people, including foreigners. Both of these attacks were carried out by Al-Qaeda in the Islamic Maghreb.Burkina Faso also faced an uprising in 2014 leading to the downfall of President Blaise Compaoré later that year. Burkina Faso is a member of the Trans-Saharan Counterterrorism Partnership and its commitment of peacekeeping troops in Mali and Sudan has made it a target for extremists in the region.
Document 10: Nigeria national football team: Nigeria Nickname (s) Super Eagles Association Nigeria Football Federation Confederation CAF (Africa) Sub-confederation WAFU (West Africa) Head coach Gernot Rohr Captain John Mikel Obi Top scorer Rashidi Yekini (37) Home stadium Abuja National Stadium FIFA code NGA First colours Second colours FIFA ranking Current 49 1 (16 August 2018) Highest 5 (April 1994) Lowest 82 (November 1999) Elo ranking Current 44 (11 July 2018) Highest 15 (31 May 2004) Lowest 72 (27 December 1964) First international Sierra Leone 0 -- 2 Nigeria (Freetown, Sierra Leone; 8 October 1949) Biggest win Nigeria 10 -- 1 Dahomey (Lagos, Nigeria; 28 November 1959) Biggest defeat Gold Coast and British Togoland 7 -- 0 Nigeria (Accra, Gold Coast; 1 June 1955) World Cup Appearances 6 (first in 1994) Best result Round of 16 (1994, 1998, 2014) Africa Cup of Nations Appearances 17 (first in 1963) Best result Champions (1980, 1994, 2013) African Nations Championship Appearances 3 (first in 2014) Best result Runners up (2018) Confederations Cup Appearances 2 (first in 1995) Best result Fourth Place (1995) Medal record (show) Men's football Olympic Games 1996 Atlanta Team
Document 11: Islamism: Originating as the Jama'at al-Tawhid wal-Jihad in 1999, it pledged allegiance to al-Qaeda in 2004, participated in the Iraqi insurgency that followed the March 2003 invasion of Iraq by Western forces, joined the fight in the Syrian Civil War beginning in March 2011, and was expelled from al-Qaeda in early 2014, (which complained of its failure to consult and "notorious intransigence"). The group gained prominence after it drove Iraqi government forces out of key cities in western Iraq in a 2014 offensive. The group is adept at social media, posting Internet videos of beheadings of soldiers, civilians, journalists and aid workers, and is known for its destruction of cultural heritage sites. The United Nations has held ISIL responsible for human rights abuses and war crimes, and Amnesty International has reported ethnic cleansing by the group on a "historic scale". The group has been designated a terrorist organisation by the United Nations, the European Union and member states, the United States, India, Indonesia, Turkey, Saudi Arabia, Syria and other countries.
Document 12: Niki Wories: Niki Wories was born on 18 June 1996 in Almere, Netherlands. She is the second daughter of Annelies and Paul Wories. She studied at the Johan Cruyff Academy before moving to Quebec, Canada.
Document 13: Alex Waimora: Alex Allen Waimora is a Solomon Islands international football player. Formerly a member of Three Kings in the New Zealand ASB Youth League. He has played for Solomon Islands U14&U15 Futsal Team in 2009 and 2010. He later played in 2011 edition of the Oceania FIFA U17 World Cup Qualifiers for Solomon Islands. He has made 1 appearance for the Solomon Islands national football team.
Document 14: Stephen López: Stephen López (born September 24, 1980) is a Belizean professional footballer who plays as a goalkeeper for Suga Boys Juventus.
Document 15: Nigeria national football team: Nigeria Nickname (s) Super Eagles Association Nigeria Football Federation Confederation CAF (Africa) Sub-confederation WAFU (West Africa) Head coach Gernot Rohr Captain John Obi Mikel Most caps Vincent Enyeama (101) Joseph Yobo (101) Top scorer Rashidi Yekini (37) Home stadium Abuja National Stadium FIFA code NGA First colours Second colours FIFA ranking Current 47 5 (12 April 2018) Highest 5 (April 1994) Lowest 82 (November 1999) Elo ranking Current 43 (8 April 2018) Highest 15 (31 May 2004) Lowest 72 (27 December 1964) First international Sierra Leone 0 -- 2 Nigeria (Freetown, Sierra Leone; 8 October 1949) Biggest win Nigeria 10 -- 1 Dahomey (Lagos, Nigeria; 28 November 1959) Biggest defeat Gold Coast and British Togoland 7 -- 0 Nigeria (Accra, Gold Coast; 1 June 1955) World Cup Appearances 6 (first in 1994) Best result Round of 16, 1994, 1998 and 2014 Africa Cup of Nations Appearances 17 (first in 1963) Best result Champions, 1980, 1994 and 2013 African Nations Championship Appearances 3 (first in 2014) Best result Runners up, 2018 Confederations Cup Appearances 2 (first in 1995) Best result Fourth Place, 1995
ground_truth: Goodluck Jonathan
sub_queries: What is Stephen Worgu's country of citizenship? Answer: Nigeria
Who is the President of Nigeria ? Answer: Goodluck Jonathan