Question: How many children work year round in the continent where The legend of the lost was filmed?

full_context: Document 1: Child labour: Small-scale artisanal mining of gold is another source of dangerous child labour in poor rural areas in certain parts of the world. This form of mining uses labour-intensive and low-tech methods. It is informal sector of the economy. Human Rights Watch group estimates that about 12 percent of global gold production comes from artisanal mines. In west Africa, in countries such as Mali - the third largest exporter of gold in Africa - between 20,000 and 40,000 children work in artisanal mining. Locally known as orpaillage, children as young as 6 years old work with their families. These children and families suffer chronic exposure to toxic chemicals including mercury, and do hazardous work such as digging shafts and working underground, pulling up, carrying and crushing the ore. The poor work practices harm the long term health of children, as well as release hundreds of tons of mercury every year into local rivers, ground water and lakes. Gold is important to the economy of Mali and Ghana. For Mali, it is the second largest earner of its export revenue. For many poor families with children, it is the primary and sometimes the only source of income.
Document 2: Child labour: In developing countries, with high poverty and poor schooling opportunities, child labour is still prevalent. In 2010, sub-saharan Africa had the highest incidence rates of child labour, with several African nations witnessing over 50 percent of children aged 5–14 working. Worldwide agriculture is the largest employer of child labour. Vast majority of child labour is found in rural settings and informal urban economy; children are predominantly employed by their parents, rather than factories. Poverty and lack of schools are considered as the primary cause of child labour.
Document 3: Libya: Libya (; ; ), officially the State of Libya, is a country in the Maghreb region in North Africa, bordered by the Mediterranean Sea to the north, Egypt to the east, Sudan to the southeast, Chad to the south, Niger to the southwest, Algeria to the west, and Tunisia to the northwest. The sovereign state is made of three historical regions: Tripolitania, Fezzan and Cyrenaica. With an area of almost , Libya is the fourth largest country in Africa, and is the 16th largest country in the world. Libya has the 10th-largest proven oil reserves of any country in the world. The largest city and capital, Tripoli, is located in western Libya and contains over one million of Libya's six million people. The second-largest city is Benghazi, which is located in eastern Libya.
Document 4: Child labour: Other legal factors that have been implemented to end and reduce child labour includes the global response that came into force in 1979 by the declaration of the International Year of the Child. Along with the Human Rights Committee of the United Nations, these two declarations worked on many levels to eliminate child labour. Although many actions have been taken to end this epidemic, child labour in Africa is still an issue today due to the unclear definition of adolescence and how much time is needed for children to engage in activities that are crucial for their development. Another issue that often comes into play is the link between what constitutes as child labour within the household due to the cultural acceptance of children helping run the family business. In the end, there is a consistent challenge for the national government to strengthen its grip politically on child labour, and to increase education and awareness on the issue of children working below the legal age limit. With children playing an important role in the African economy, child labour still plays an important role for many in the 20th century.
Document 5: Legend of the Lost: Wayne liked the location work in Rome and Libya. The plot is vaguely similar to another of Wayne's movies crossing the Mojave Desert. The Roman remains of Leptis Magna in Libya were used extensively as a location for the ancient city. In the script Wayne's character refers to 'Timgad' in sardonic reference to the apparent delusions of Paul's father, despite the fact this places a considerable strain on the geography of the plot. The lost city of Timgad referred to in the film was actually the Leptis Magna ruins, a Roman city dating back to the 7th century B.C. near Tripoli, in northwest Libya, while ``Timbuktu ''was actually in Zliten, Libya. Headquarters for the film were located in Ghadames, where, according to the publicity material, citizens of the villages were employed on set, as well as some native Tuaregs, an ancient desert tribe.
Document 6: Ottoman Tripolitania: As a result of this conflict, the Ottoman Turks ceded the provinces of Tripolitania, Fezzan, and Cyrenaica to Italy. These provinces together formed what became known as Libya.
Document 7: Mosaic: In 1913 the Zliten mosaic, a Roman mosaic famous for its many scenes from gladiatorial contests, hunting and everyday life, was discovered in the Libyan town of Zliten. In 2000 archaeologists working in Leptis Magna, Libya, uncovered a 30 ft length of five colorful mosaics created during the 1st or 2nd century AD. The mosaics show a warrior in combat with a deer, four young men wrestling a wild bull to the ground, and a gladiator resting in a state of fatigue, staring at his slain opponent. The mosaics decorated the walls of a cold plunge pool in a bath house within a Roman villa. The gladiator mosaic is noted by scholars as one of the finest examples of mosaic art ever seen — a "masterpiece comparable in quality with the Alexander Mosaic in Pompeii."
Document 8: Chad: Chad has several regions: a desert zone in the north, an arid Sahelian belt in the centre and a more fertile Sudanian Savanna zone in the south. Lake Chad, after which the country is named, is the largest wetland in Chad and the second - largest in Africa. The capital N'Djamena is the largest city.
Document 9: Sarir field: The Sarir Field was discovered in southern Cyrenaica during 1961 and is considered to be the largest oil field in Libya, with estimated oil reserves of . Sarir is operated by the Arabian Gulf Oil Company (AGOCO), a subsidiary of the state-owned National Oil Corporation (NOC).
Document 10: Child labour: Children working at a young age has been a consistent theme throughout Africa. Many children began first working in the home to help their parents run the family farm. Children in Africa today are often forced into exploitative labour due to family debt and other financial factors, leading to ongoing poverty. Other types of domestic child labour include working in commercial plantations, begging, and other sales such as boot shining. In total, there is an estimated five million children who are currently working in the field of agriculture which steadily increases during the time of harvest. Along with 30 percent of children who are picking coffee, there are an estimated 25,000 school age children who work year round.
Document 11: Sabratha: Sabratha, Sabratah or Siburata (), in the Zawiya District of Libya, was the westernmost of the ancient "three cities" of Roman Tripolis. From 2001 to 2007 it was the capital of the former Sabratha wa Sorman District. It lies on the Mediterranean coast about west of modern Tripoli. The extant archaeological site was inscribed as a UNESCO World Heritage Site in 1982.
Document 12: Atiq Mosque, Awjila: The Atiq Mosque (also called the Great Mosque, or al-Kabir mosque) () is a mosque in the oasis village of Awjila, in the Sahara desert of the Cyrenaica region of eastern Libya. The community dates back to classical times. Since being taken by the Arabs in the seventh century, Islam has always played a central role in the life of Awjila. The 12th-century mosque, the oldest in the region, has unusual conical domes made of mudbrick and limestone that provide light and ventilation.
Document 13: Child labour: Systematic use of child labour was common place in the colonies of European powers between 1650 and 1950. In Africa, colonial administrators encouraged traditional kin-ordered modes of production, that is hiring a household for work not just the adults. Millions of children worked in colonial agricultural plantations, mines and domestic service industries. Sophisticated schemes were promulgated where children in these colonies between the ages of 5–14 were hired as an apprentice without pay in exchange for learning a craft. A system of Pauper Apprenticeship came into practice in the 19th century where the colonial master neither needed the native parents' nor child's approval to assign a child to labour, away from parents, at a distant farm owned by a different colonial master. Other schemes included 'earn-and-learn' programs where children would work and thereby learn. Britain for example passed a law, the so-called Masters and Servants Act of 1899, followed by Tax and Pass Law, to encourage child labour in colonies particularly in Africa. These laws offered the native people the legal ownership to some of the native land in exchange for making labour of wife and children available to colonial government's needs such as in farms and as picannins.
Document 14: Benghazi: Benghazi continues to hold institutions and organizations normally associated with a national capital city, such as the country's parliament, national library, and the headquarters of Libyan Airlines, the national airline, and of the National Oil Corporation. This creates a constant atmosphere of rivalry and sensitivities between Benghazi and Tripoli, and between Cyrenaica and Tripolitania. The population was 670,797 at the 2006 census.On 15 February 2011,  an uprising against the government of Muammar Gaddafi occurred in the city. The revolts spread by 17 February to Bayda, Tobruk, Ajdabya, Al Marj in the East and Zintan, Zawiya in the West, calling for the end of the Gaddafi Regime. Benghazi was taken by Gaddafi opponents on 21 February, who founded the National Transitional Council. On 19 March, the city was the site of the turning point of the Libyan Civil War, when the Libyan Army attempted to score a decisive victory against the NTC by attacking Benghazi, but was forced back by local resistance and intervention from the French Air Force authorized by UNSC Resolution 1973 to protect civilians, allowing the rebellion to continue.
Document 15: The Hills Have Eyes (2006 film): Director Aja and art director Grégory Levasseur chose not to film in the original's filming location of Victorville, California, and instead scouted many locations for filming including Namibia, South Africa, New Mexico, and Mexico. The two settled on Ouarzazate in Morocco, which was also known as ``the gateway to the Sahara Desert ''.
ground_truth: estimated 25,000
sub_queries: where was the legend of the lost filmed Answer: Libya
What continent is Libya located on? Answer: Africa
How many children work year round in Africa ? Answer: estimated 25,000