Problem: 2008 Summer Olympics torch relay:

The Olympic Flame is supposed to remain lit for the whole relay. When the Torch is extinguished at night, on airplanes, in bad weather, or during protests (such as the several occasions in Paris), the Olympic Flame is kept alight in a set of 8 lanterns.[citation needed]

In what is the torch flame kept lit when the torch must be off?
---
A: lanterns.

Problem: Major corporations with headquarters in Tennessee include FedEx, AutoZone and International Paper, all based in Memphis; Pilot Corporation and Regal Entertainment Group, based in Knoxville; Eastman Chemical Company, based in Kingsport; the North American headquarters of Nissan Motor Company, based in Franklin; Hospital Corporation of America and Caterpillar Financial, based in Nashville; and Unum, based in Chattanooga. Tennessee is also the location of the Volkswagen factory in Chattanooga, a $2 billion polysilicon production facility by Wacker Chemie in Bradley County, and a $1.2 billion polysilicon production facility by Hemlock Semiconductor in Clarksville.
Which major global shipping company is based in Memphis?
---
Answer: FedEx

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Because the electron mobility is higher than the hole mobility for all semiconductor materials, a given bipolar npn transistor tends to be swifter than an equivalent pnp transistor. GaAs has the highest electron mobility of the three semiconductors. It is for this reason that GaAs is used in high-frequency applications. A relatively recent FET development, the high-electron-mobility transistor (HEMT), has a heterostructure (junction between different semiconductor materials) of aluminium gallium arsenide (AlGaAs)-gallium arsenide (GaAs) which has twice the electron mobility of a GaAs-metal barrier junction. Because of their high speed and low noise, HEMTs are used in satellite receivers working at frequencies around 12 GHz. HEMTs based on gallium nitride and aluminium gallium nitride (AlGaN/GaN HEMTs) provide a still higher electron mobility and are being developed for various applications.
What causes HEMTs to have high speed and low noise?
A: unanswerable

Context and question: John, the youngest of five sons of King Henry II of England and Eleanor of Aquitaine, was at first not expected to inherit significant lands. Following the failed rebellion of his elder brothers between 1173 and 1174, however, John became Henry's favourite child. He was appointed the Lord of Ireland in 1177 and given lands in England and on the continent. John's elder brothers William, Henry and Geoffrey died young; by the time Richard I became king in 1189, John was a potential heir to the throne. John unsuccessfully attempted a rebellion against Richard's royal administrators whilst his brother was participating in the Third Crusade. Despite this, after Richard died in 1199, John was proclaimed King of England, and came to an agreement with Philip II of France to recognise John's possession of the continental Angevin lands at the peace treaty of Le Goulet in 1200.
When was John appointed the Lord of Ireland?
Answer: 1177

Question: So-called voiced aspirated consonants are nearly always pronounced instead with breathy voice, a type of phonation or vibration of the vocal folds. The modifier letter after a voiced consonant actually represents a breathy-voiced or murmured dental stop, as with the "voiced aspirated" bilabial stop b in the Indo-Aryan languages. This consonant is therefore more accurately transcribed as b, with the diacritic for breathy voice, or with the modifier letter b, a superscript form of the symbol for the voiced glottal fricative .
Is there an answer to this question: What is the superscript form of the symbol for the voiceless glottal fricative?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Nanjing is an important railway hub in eastern China. It serves as rail junction for the Beijing-Shanghai (Jinghu) (which is itself composed of the old Jinpu and Huning Railways), NanjingTongling Railway (Ningtong), NanjingQidong (Ningqi), and the Nanjing-Xian (Ningxi) which encompasses the HefeiNanjing Railway. Nanjing is connected to the national high-speed railway network by BeijingShanghai High-Speed Railway and ShanghaiWuhanChengdu Passenger Dedicated Line, with several more high-speed rail lines under construction.
What lines comprise the Beijing-Shanghai (Jinghu) line?
A:
the old Jinpu and Huning Railways