Question: When did Anthony Njokuani's country of citizenship launch its fourth satellite?

full_context: Document 1: Nguyễn Quốc Huân: Nguyễn Quốc Huân (born October 2, 1981 in Hanoi) is a Vietnamese taekwondo practitioner, who competed in the men's flyweight category. He claimed a silver medal in the 58-kg division at the 2005 Southeast Asian Games in Manila, Philippines, and finished fifth at the 2004 Summer Olympics, representing his nation Vietnam. Nguyen is also the elder brother and a personal coach of Nguyen Quoc Cuong, who claimed the bronze medal in the boys' 55 kg category at the inaugural Youth Olympic Games in Singapore in 2010.
Document 2: Nigeria: On 24 March 2009, the Nigerian Federal Ministry of Science and Technology, NigComSat Ltd. and CGWIC signed another contract for the in-orbit delivery of the NigComSat-1R satellite. NigComSat-1R was also a DFH-4 satellite, and the replacement for the failed NigComSat-1 was successfully launched into orbit by China in Xichang on December 19, 2011. The satellite according to then-Nigerian President Goodluck Jonathan which was paid for by the insurance policy on NigComSat-1 which de-orbited in 2009, would have a positive impact on national development in various sectors such as communications, internet services, health, agriculture, environmental protection and national security.
Document 3: Nigeria: Goodluck Jonathan served as Nigeria's president till 16 April 2011, when a new presidential election in Nigeria was conducted. Jonathan of the PDP was declared the winner on 19 April 2011, having won the election with a total of 22,495,187 of the 39,469,484 votes cast, to stand ahead of Muhammadu Buhari from the main opposition party, the Congress for Progressive Change (CPC), which won 12,214,853 of the total votes cast. The international media reported the elections as having run smoothly with relatively little violence or voter fraud, in contrast to previous elections.
Document 4: Nigeria: NigeriaSat-2, Nigeria's second satellite, was built as a high-resolution earth satellite by Surrey Space Technology Limited, a United Kingdom-based satellite technology company. It has 2.5-metre resolution panchromatic (very high resolution), 5-metre multispectral (high resolution, NIR red, green and red bands), and 32-metre multispectral (medium resolution, NIR red, green and red bands) antennas, with a ground receiving station in Abuja. The NigeriaSat-2 spacecraft alone was built at a cost of over £35 million. This satellite was launched into orbit from a military base in China.
Document 5: Nigeria: Nigeria in recent years has been embracing industrialisation. It currently has an indigenous vehicle manufacturing company, Innoson Motors, which manufactures Rapid Transit Buses, Trucks and SUVs with an upcoming introduction of Cars. Nigeria also has few Electronic manufacturers like Zinox, the first Branded Nigerian Computer and Electronic gadgets (like tablet PCs) manufacturers. In 2013, Nigeria introduced a policy regarding import duty on vehicles to encourage local manufacturing companies in the country. In this regard, some foreign vehicle manufacturing companies like Nissan have made known their plans to have manufacturing plants in Nigeria. Ogun is considered to be the current Nigeria's industrial hub, as most factories are located in Ogun and more companies are moving there, followed by Lagos.
Document 6: André Bahia: André Bahia was born and raised in the Tijuca area of Rio de Janeiro. He has four brothers from his father's side from a previous marriage and one sister. His father was a professional boxer in one of the lightest classes available. He was a six time Rio State champion.
Document 7: Ufuoma McDermott: Ejenobor was born in Benin City to Nigerian parents who hail from Delta State in Nigeria. She moved a lot - from Benin City to Jos, where she spent the better part of her toddler years, and later to Lagos, where she has lived for the greater part of her life and still resides till date. At the age of seven, her father coined a pet name for her: ISIO (which means "star" in Urhobo). She was so named after the star actress of the TELEFEST programme put together by NTA Benin, "The Pot of Life".
Document 8: Aamer Anwar: Anwar was born in England and moved to Scotland in 1986 to study mechanical engineering at the University of Glasgow for a future in the Royal Air Force. He became a student activist and led a campaign against alleged racism at the city's Dental Hospital. This eventually saw the introduction of anonymous marking across all faculties at the University.
Document 9: Yuya Yamamoto: Yuya Yamamoto was born in Takasu, Onomichi in Hiroshima, Japan on July 15, 1984. He started learning karate at Kushukaikan during his high school life. Although he was only 16 years old, he won the All Japan Shin Karate championships at lightweight. After winning the championship, he moved to Tokyo and joined "Booch Beat", a kickboxing team, to be a kickboxer. On September 7, 2001, he debuted as a professional kickboxer for All Japan Kickboxing Federation(AJKF). At this time, he was only 17 years old.
Document 10: Anthony Njokuani: Born in Enugu, Nigeria on March 1, 1980, Anthony Njokuani and his family immigrated to the United States in 1983, settling in Garland, Texas. Njokuani began his martial arts training in Tae Kwon Do at the age of 17 before later moving on to Muay Thai and then mixed martial arts at the age of 21. Njokuani's younger brother, Chidi, is also a professional mixed martial artist.
Document 11: BeiDou: In February 2007, the fourth and last satellite of the BeiDou-1 system, BeiDou-1D (sometimes called BeiDou-2A, serving as a backup satellite), was sent up into space. It was reported that the satellite had suffered from a control system malfunction but was then fully restored.
Document 12: Nigeria: The Nigerian government has commissioned the overseas production and launch of four satellites. The Nigeriasat-1 was the first satellite to be built under the Nigerian government sponsorship. The satellite was launched from Russia on 27 September 2003. Nigeriasat-1 was part of the world-wide Disaster Monitoring Constellation System. The primary objectives of the Nigeriasat-1 were: to give early warning signals of environmental disaster; to help detect and control desertification in the northern part of Nigeria; to assist in demographic planning; to establish the relationship between malaria vectors and the environment that breeds malaria and to give early warning signals on future outbreaks of meningitis using remote sensing technology; to provide the technology needed to bring education to all parts of the country through distant learning; and to aid in conflict resolution and border disputes by mapping out state and International borders.
Document 13: Nguyễn Lộc: In his younger years he trained in traditional Vietnamese martial arts. In 1938, grandmaster Nguyễn introduced his style "Vovinam" to the public. After a demonstration in 1939 in Hanoi, Vovinam quickly spread across the country, and internationally to the Vietnamese diaspora via France. However the French banned the movement in 1942.
Document 14: Communications in Somalia: In November 2013, Somalia received its first fiber optic connection. The country previously had to rely on expensive satellite links due to the civil conflict, which limited internet usage. However, residents now have access to broadband internet cable for the first time after an agreement reached between Hormuud Telecom and Liquid Telecom. The deal will see Liquid Telecom link Hormuud to its 17,000 km (10,500 mile) network of terrestrial cables, which will deliver faster internet capacity. The fiber optic connection will also make online access more affordable to the average user. This in turn is expected to further increase the number of internet users. Dalkom Somalia reached a similar agreement with the West Indian Ocean Cable Company (WIOCC) Ltd, which it holds shares in. Effective the first quarter of 2014, the deal will establish fiber optic connectivity to and from Somalia via the EASSy cable. The new services are expected to reduce the cost of international bandwidth and to better optimize performance, thereby further broadening internet access. Dalkom Somalia is concurrently constructing a 1,000 square mile state-of-the-art data center in Mogadishu. The site will facilitate direct connection into the international fiber optic network by hosting equipment for all of the capital's ISPs and telecommunication companies.
Document 15: Eni Njoku: Eni Njoku studied botany at the University of Manchester in England. He graduated with a first class honors degree in 1947 and obtained his M.A. degree the following year. In 1954, he obtained his doctorate from the University of London.
ground_truth: December 19, 2011
sub_queries: What is Anthony Njokuani's country of citizenship? Answer: Nigeria
When was Nigeria 's fourth satellite launched? Answer: December 19, 2011