Article: Bohr also introduced the quantity , now known as the reduced Planck constant, as the quantum of angular momentum. At first, Bohr thought that this was the angular momentum of each electron in an atom: this proved incorrect and, despite developments by Sommerfeld and others, an accurate description of the electron angular momentum proved beyond the Bohr model. The correct quantization rules for electrons in which the energy reduces to the Bohr model equation in the case of the hydrogen atom were given by Heisenberg's matrix mechanics in 1925 and the Schrodinger wave equation in 1926: the reduced Planck constant remains the fundamental quantum of angular momentum. In modern terms, if J is the total angular momentum of a system with rotational invariance, and Jz the angular momentum measured along any given direction, these quantities can only take on the values

Question: According to Heisenberg and Schrodinger, the reduced Planck constant remains what?
Ans: the fundamental quantum of angular momentum

Here is a question about this article: This is not to say that Whitehead's thought was widely accepted or even well-understood. His philosophical work is generally considered to be among the most difficult to understand in all of the western canon. Even professional philosophers struggled to follow Whitehead's writings. One famous story illustrating the level of difficulty of Whitehead's philosophy centers around the delivery of Whitehead's Gifford lectures in 192728 following Arthur Eddington's lectures of the year previous which Whitehead would later publish as Process and Reality:
What is the answer to this question: What is the general opinion of the difficulty level of Whitehead's work in philosophy?
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So... generally considered to be among the most difficult to understand in all of the western canon

The problem: Answer a question about this article:
His next directorial feature was the Raiders prequel Indiana Jones and the Temple of Doom. Teaming up once again with Lucas and Ford, the film was plagued with uncertainty for the material and script. This film and the Spielberg-produced Gremlins led to the creation of the PG-13 rating due to the high level of violence in films targeted at younger audiences. In spite of this, Temple of Doom is rated PG by the MPAA, even though it is the darkest and, possibly, most violent Indy film. Nonetheless, the film was still a huge blockbuster hit in 1984. It was on this project that Spielberg also met his future wife, actress Kate Capshaw.
When did 'Temple of Doom' debut?
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The answer: 1984

Problem: Please answer a question about the following article about London:
London has a diverse range of peoples and cultures, and more than 300 languages are spoken within Greater London. The Office for National Statistics estimated its mid-2014 population to be 8,538,689, the largest of any municipality in the European Union, and accounting for 12.5 percent of the UK population. London's urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants according to the 2011 census. The city's metropolitan area is one of the most populous in Europe with 13,879,757 inhabitants,[note 4] while the Greater London Authority states the population of the city-region (covering a large part of the south east) as 22.7 million. London was the world's most populous city from around 1831 to 1925.
What is the population of metropolitan London?
A: 13,879,757

Question: Read this and answer the question

The MPEG-1 standard does not include a precise specification for an MP3 encoder, but does provide example psychoacoustic models, rate loop, and the like in the non-normative part of the original standard. At present, these suggested implementations are quite dated. Implementers of the standard were supposed to devise their own algorithms suitable for removing parts of the information from the audio input. As a result, there are many different MP3 encoders available, each producing files of differing quality. Comparisons are widely available, so it is easy for a prospective user of an encoder to research the best choice. An encoder that is proficient at encoding at higher bit rates (such as LAME) is not necessarily as good at lower bit rates.

Example psychoacoustic models and rate loops can be foundin which part of the original standard?
Answer: non-normative

The first Europeans to disembark and explore the region were the Portuguese navigators Diogo Cao in 1485 and Bartolomeu Dias in 1486; still the region was not claimed by the Portuguese crown. However, like most of Sub-Saharan Africa, Namibia was not extensively explored by Europeans until the 19th century, when traders and settlers arrived, principally from Germany and Sweden. In the late 19th century Dorsland trekkers crossed the area on their way from the Transvaal to Angola. Some of them settled in Namibia instead of continuing their journey.
When did Bartolomeu Dias explore Namibia?
1486