Problem: Houston:

The Houston Theater District, located downtown, is home to nine major performing arts organizations and six performance halls. It is the second-largest concentration of theater seats in a downtown area in the United States. Houston is one of few United States cities with permanent, professional, resident companies in all major performing arts disciplines: opera (Houston Grand Opera), ballet (Houston Ballet), music (Houston Symphony Orchestra), and theater (The Alley Theatre). Houston is also home to folk artists, art groups and various small progressive arts organizations. Houston attracts many touring Broadway acts, concerts, shows, and exhibitions for a variety of interests. Facilities in the Theater District include the Jones Hallhome of the Houston Symphony Orchestra and Society for the Performing Artsand the Hobby Center for the Performing Arts.

To what group is Jones Hall home?
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A: Houston Symphony Orchestra

Problem: Following World War II, Britain retained control of both British Somaliland and Italian Somaliland as protectorates. In 1945, during the Potsdam Conference, the United Nations granted Italy trusteeship of Italian Somaliland, but only under close supervision and on the condition first proposed by the Somali Youth League (SYL) and other nascent Somali political organizations, such as Hizbia Digil Mirifle Somali (HDMS) and the Somali National League (SNL) that Somalia achieve independence within ten years. British Somaliland remained a protectorate of Britain until 1960.
Along with the Somali Youth League and Somali National League, what was an early Somali political organization?
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Answer: Hizbia Digil Mirifle Somali

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In recent years, Nanjing has been developing its economy, commerce, industry, as well as city construction. In 2013 the city's GDP was RMB 801 billion (3rd in Jiangsu), and GDP per capita(current price) was RMB 98,174(US$16041), a 11 percent increase from 2012. The average urban resident's disposable income was RMB 36,200, while the average rural resident's net income was RMB 14,513. The registered urban unemployment rate was 3.02 percent, lower than the national average (4.3 percent). Nanjing's Gross Domestic Product ranked 12th in 2013 in China, and its overall competence ranked 6th in mainland and 8th including Taiwan and Hong Kong in 2009.
What was Nanjing's GDP in 2013?
A: RMB 801 billion

Context and question: Dell assembled computers for the EMEA market at the Limerick facility in the Republic of Ireland, and once employed about 4,500 people in that country. Dell began manufacturing in Limerick in 1991 and went on to become Ireland's largest exporter of goods and its second-largest company and foreign investor. On January 8, 2009, Dell announced that it would move all Dell manufacturing in Limerick to Dell's new plant in the Polish city of odz by January 2010. European Union officials said they would investigate a 52.7million aid package the Polish government used to attract Dell away from Ireland. European Manufacturing Facility 1 (EMF1, opened in 1990) and EMF3 form part of the Raheen Industrial Estate near Limerick. EMF2 (previously a Wang facility, later occupied by Flextronics, situated in Castletroy) closed in 2002,[citation needed] and Dell Inc. has consolidated production into EMF3 (EMF1 now[when?] contains only offices). Subsidies from the Polish government did keep Dell for a long time. After ending assembly in the Limerick plant the Cherrywood Technology Campus in Dublin was the largest Dell office in the republic with over 1200 people in sales (mainly UK & Ireland), support (enterprise support for EMEA) and research and development for cloud computing, but no more manufacturing except Dell's Alienware subsidiary, which manufactures PCs in an Athlone, Ireland plant. Whether this facility will remain in Ireland is not certain. Construction of EMF4 in odz, Poland has started[update]: Dell started production there in autumn 2007.
How many Irish employees did Dell hire?
Answer: 4,500

Question: Hydrostatic gauges (such as the mercury column manometer) consist of a vertical column of liquid in a tube whose ends are exposed to different pressures. The column will rise or fall until its weight is in equilibrium with the pressure differential between the two ends of the tube. The simplest design is a closed-end U-shaped tube, one side of which is connected to the region of interest. Any fluid can be used, but mercury is preferred for its high density and low vapour pressure. Simple hydrostatic gauges can measure pressures ranging from 1 torr (100 Pa) to above atmospheric. An important variation is the McLeod gauge which isolates a known volume of vacuum and compresses it to multiply the height variation of the liquid column. The McLeod gauge can measure vacuums as high as 106 torr (0.1 mPa), which is the lowest direct measurement of pressure that is possible with current technology. Other vacuum gauges can measure lower pressures, but only indirectly by measurement of other pressure-controlled properties. These indirect measurements must be calibrated via a direct measurement, most commonly a McLeod gauge.
Is there an answer to this question: What is used to measure mercury in the air?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Starting in 2006, Apple's industrial design shifted to favor aluminum, which was used in the construction of the first MacBook Pro. Glass was added in 2008 with the introduction of the unibody MacBook Pro. These materials are billed as environmentally friendly. The iMac, MacBook Pro, MacBook Air, and Mac Mini lines currently all use aluminum enclosures, and are now made of a single unibody. Chief designer Jonathan Ive continues to guide products towards a minimalist and simple feel, including eliminating of replaceable batteries in notebooks. Multi-touch gestures from the iPhone's interface have been applied to the Mac line in the form of touch pads on notebooks and the Magic Mouse and Magic Trackpad for desktops.
Which material did Apple add with the 2009 unibody MacBrook Pro?
A:
unanswerable