Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
2010s saw multiple new sounds in house music developed by numerous DJs. Sweden knew a prominence of snare-less "Swedish progressive house" with the emergence of Sebastian Ingrosso, Axwell, Steve Angello (These three formed a trio called Swedish House Mafia), Avicii, Alesso, etc. Netherlands brought together a concept of "Dirty Dutch", electro house subgenre characterized by very abrasive leads and darker arpeggios, with prominent DJs Chuckie, Hardwell, Laidback Luke, Afrojack, R3hab, Bingo Players, Quintino, Alvaro, Cedric Gervais, 2G, etc. Elsewhere, fusion genres derivative of 2000s progressive house returned to prominence, especially with the help of DJs Calvin Harris, Eric Prydz, Mat Zo, Above & Beyond and Fonzerelli in Europe, Deadmau5, Kaskade, Steve Aoki, Porter Robinson and Wolfgang Gartner in the US and Canada. The growing popularity of such artists led to the emergence of electro house and progressive house blended sounds in popular music, such as singles Lady Gaga's "Marry the Night", The Black Eyed Peas' "The Best One Yet (The Boy)" and the will.i.am and Britney Spears "Scream & Shout". Big room house found increasing popularity since 2010, particularly through international dance music festivals such as Tomorrowland, Ultra Music Festival, and Electric Daisy Carnival.
What was different about US progressive house music?
A: unanswerable

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Even though there is a broad scientific agreement that essentialist and typological conceptualizations of race are untenable, scientists around the world continue to conceptualize race in widely differing ways, some of which have essentialist implications. While some researchers sometimes use the concept of race to make distinctions among fuzzy sets of traits, others in the scientific community suggest that the idea of race often is used in a naive or simplistic way,[page needed] and argue that, among humans, race has no taxonomic significance by pointing out that all living humans belong to the same species, Homo sapiens, and subspecies, Homo sapiens sapiens.
How do scientists around the world continue to conceptualize race?
A: in widely differing ways

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"The first Ottoman Medrese was created in İznik in 1331 and most Ottoman medreses followed the traditions of Sunni Islam." "When an Ottoman sultan established a new medrese, he would invite scholars from the Islamic world—for example, Murad II brought scholars from Persia, such as ʻAlāʼ al-Dīn and Fakhr al-Dīn who helped enhance the reputation of the Ottoman medrese". This reveals that the Islamic world was interconnected in the early modern period as they travelled around to other Islamic states exchanging knowledge. This sense that the Ottoman Empire was becoming modernised through globalization is also recognised by Hamadeh who says: "Change in the eighteenth century as the beginning of a long and unilinear march toward westernisation reflects the two centuries of reformation in sovereign identity." İnalcık also mentions that while scholars from for example Persia travelled to the Ottomans in order to share their knowledge, Ottomans travelled as well to receive education from scholars of these Islamic lands, such as Egypt, Persia and Turkestan. Hence, this reveals that similar to today's modern world, individuals from the early modern society travelled abroad to receive education and share knowledge and that the world was more interconnected than it seems. Also, it reveals how the system of "schooling" was also similar to today's modern world where students travel abroad to different countries for studies. Examples of Ottoman madaris are the ones built by Mehmed the Conqueror. He built eight madaris that were built "on either side of the mosque where there were eight higher madaris for specialised studies and eight lower medreses, which prepared students for these." The fact that they were built around, or near mosques reveals the religious impulses behind madrasa building and it reveals the interconnectedness between institutions of learning and religion. The students who completed their education in the lower medreses became known as danismends. This reveals that similar to the education system today, the Ottomans' educational system involved different kinds of schools attached to different kinds of levels. For example, there were lower madaris and specialised ones, and for one to get into the specialised area meant that he had to complete the classes in the lower one in order to adequately prepare himself for higher learning.
Where were Ottoman madaris built?
A: near mosques

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Additionally, there are issues of connections between different electrical services, particularly connecting intercity lines with sections electrified for commuter traffic, but also between commuter lines built to different standards. This can cause electrification of certain connections to be very expensive simply because of the implications on the sections it is connecting. Many lines have come to be overlaid with multiple electrification standards for different trains to avoid having to replace the existing rolling stock on those lines. Obviously, this requires that the economics of a particular connection must be more compelling and this has prevented complete electrification of many lines. In a few cases, there are diesel trains running along completely electrified routes and this can be due to incompatibility of electrification standards along the route.
Why the commuter lines built to different standards can cause be complicated?
A:
the implications on the sections it is connecting