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In contrast, the boroughs of Xochimilco (172th), Tláhuac (177th) and Iztapalapa (183th) presented the lowest HDI values of the Federal District with values of .8481, .8473 and .8464 respectively—values still in the global high-HDI range. The only borough that did not present a high HDI was that of rural Milpa Alta which presented a "medium" HDI of .7984, far below all other boroughs (627th nationally while the rest stood in the top 200). Mexico City's HDI for the 2005 report was of .9012 (very high), and its 2010 value of .9225 (very high) or (by newer methodology) .8307, and Mexico's highest.

What rank was Milpa Alta nationally in terms of HDI score?
Answer: 627th
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On 20 April 1992, The Freddie Mercury Tribute Concert was held at London's Wembley Stadium to a 72,000-strong crowd. Performers, including Def Leppard, Robert Plant, Guns N' Roses, Elton John, David Bowie, George Michael, Annie Lennox, Seal, Extreme, and Metallica performed various Queen songs along with the three remaining Queen members (and Spike Edney.) The concert is listed in the Guinness Book of Records as "The largest rock star benefit concert", as it was televised to over 1.2 billion viewers worldwide, and raised over £20,000,000 for AIDS charities.

Which band was he largest benefit concert in history about?
Answer: Queen
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Proto-Slavic, the supposed ancestor language of all Slavic languages, is a descendant of common Proto-Indo-European, via a Balto-Slavic stage in which it developed numerous lexical and morphophonological isoglosses with the Baltic languages. In the framework of the Kurgan hypothesis, "the Indo-Europeans who remained after the migrations [from the steppe] became speakers of Balto-Slavic".

Who became speakers of Balto-Slavic?
Answer:
Indo-Europeans