Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Most of the world's airports are owned by local, regional, or national government bodies who then lease the airport to private corporations who oversee the airport's operation. For example, in the United Kingdom the state-owned British Airports Authority originally operated eight of the nation's major commercial airports - it was subsequently privatized in the late 1980s, and following its takeover by the Spanish Ferrovial consortium in 2006, has been further divested and downsized to operating just five. Germany's Frankfurt Airport is managed by the quasi-private firm Fraport. While in India GMR Group operates, through joint ventures, Indira Gandhi International Airport and Rajiv Gandhi International Airport. Bengaluru International Airport and Chhatrapati Shivaji International Airport are controlled by GVK Group. The rest of India's airports are managed by the Airports Authority of India.
How many airports did Fraport manage originally in the UK?
A: unanswerable

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Child labour is still common in many parts of the world. Estimates for child labour vary. It ranges between 250 and 304 million, if children aged 5–17 involved in any economic activity are counted. If light occasional work is excluded, ILO estimates there were 153 million child labourers aged 5–14 worldwide in 2008. This is about 20 million less than ILO estimate for child labourers in 2004. Some 60 percent of the child labour was involved in agricultural activities such as farming, dairy, fisheries and forestry. Another 25 percent of child labourers were in service activities such as retail, hawking goods, restaurants, load and transfer of goods, storage, picking and recycling trash, polishing shoes, domestic help, and other services. The remaining 15 percent laboured in assembly and manufacturing in informal economy, home-based enterprises, factories, mines, packaging salt, operating machinery, and such operations. Two out of three child workers work alongside their parents, in unpaid family work situations. Some children work as guides for tourists, sometimes combined with bringing in business for shops and restaurants. Child labour predominantly occurs in the rural areas (70%) and informal urban sector (26%).
Some child work as guides for whom?
A: tourists

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According to a study by the China Earthquake Administration (CEA), the earthquake occurred along the Longmenshan fault, a thrust structure along the border of the Indo-Australian Plate and Eurasian Plate. Seismic activities concentrated on its mid-fracture (known as Yingxiu-Beichuan fracture). The rupture lasted close to 120 sec, with the majority of energy released in the first 80 sec. Starting from Wenchuan, the rupture propagated at an average speed of 3.1 kilometers per second 49° toward north east, rupturing a total of about 300 km. Maximum displacement amounted to 9 meters. The focus was deeper than 10 km.
Where is the Longmenshan fault located?
A: along the border of the Indo-Australian Plate and Eurasian Plate

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Since the early 1960s, theoretical linguists have moved away from the traditional concept of a phoneme, preferring to consider basic units at a more abstract level, as a component of morphemes; these units can be called morphophonemes, and analysis using this approach is called morphophonology.
On what level do theoretical linguists consider basic approaches?
A:
unanswerable