Here is a question about this article: At the time the store was introduced, purchased audio files used the AAC format with added encryption, based on the FairPlay DRM system. Up to five authorized computers and an unlimited number of iPods could play the files. Burning the files with iTunes as an audio CD, then re-importing would create music files without the DRM. The DRM could also be removed using third-party software. However, in a deal with Apple, EMI began selling DRM-free, higher-quality songs on the iTunes Stores, in a category called "iTunes Plus." While individual songs were made available at a cost of US$1.29, 30 more than the cost of a regular DRM song, entire albums were available for the same price, US$9.99, as DRM encoded albums. On October 17, 2007, Apple lowered the cost of individual iTunes Plus songs to US$0.99 per song, the same as DRM encoded tracks. On January 6, 2009, Apple announced that DRM has been removed from 80% of the music catalog, and that it would be removed from all music by April 2009.
What is the answer to this question: When the iTunes store was launched, what type of file format was used?
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So... AAC

Here is a question about this article: To improve the efficiency of the lamp, the filament usually consists of multiple coils of coiled fine wire, also known as a 'coiled coil'. For a 60-watt 120-volt lamp, the uncoiled length of the tungsten filament is usually 22.8 inches (580 mm), and the filament diameter is 0.0018 inches (0.046 mm). The advantage of the coiled coil is that evaporation of the tungsten filament is at the rate of a tungsten cylinder having a diameter equal to that of the coiled coil. The coiled-coil filament evaporates more slowly than a straight filament of the same surface area and light-emitting power. As a result, the filament can then run hotter, which results in a more efficient light source, while reducing the evaporation so that the filament will last longer than a straight filament at the same temperature.
What is the answer to this question: What positive effects does a slower-evaporating filament enable?
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So... more efficient light source

Here is a question about this article: Kumari Ghar is a palace in the center of the Kathmandu city, next to the Durbar square where a Royal Kumari selected from several Kumaris resides. Kumari, or Kumari Devi, is the tradition of worshipping young pre-pubescent girls as manifestations of the divine female energy or devi in South Asian countries. In Nepal the selection process is very rigorous. Kumari is believed to be the bodily incarnation of the goddess Taleju (the Nepali name for Durga) until she menstruates, after which it is believed that the goddess vacates her body. Serious illness or a major loss of blood from an injury are also causes for her to revert to common status. The current Royal Kumari, Matina Shakya, age four, was installed in October 2008 by the Maoist government that replaced the monarchy.
What is the answer to this question: What type of government did Nepal have after the monarchy?
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So...
Maoist