Problem: Eritrea:

Eritrea's ethnic groups each have their own styles of music and accompanying dances. Amongst the Tigrinya, the best known traditional musical genre is the guaila. Traditional instruments of Eritrean folk music include the stringed krar, kebero, begena, masenqo and the wata (a distant/rudimentary cousin of the violin). The most popular Eritrean artist is the Tigrinya singer Helen Meles, who is noted for her powerful voice and wide singing range. Other prominent local musicians include the Kunama singer Dehab Faytinga, Ruth Abraha, Bereket Mengisteab, Yemane Baria, and the late Abraham Afewerki.

Who is the most popular Eritrean singing artist?
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A: Helen Meles

Problem: Gramophone record:

Breakage was very common in the shellac era. In the 1934 John O'Hara novel, Appointment in Samarra, the protagonist "broke one of his most favorites, Whiteman's Lady of the Evening ... He wanted to cry but could not." A poignant moment in J. D. Salinger's 1951 novel The Catcher in the Rye occurs after the adolescent protagonist buys a record for his younger sister but drops it and "it broke into pieces ... I damn-near cried, it made me feel so terrible." A sequence where a school teacher's collection of 78 rpm jazz records is smashed by a group of rebellious students is a key moment in the film Blackboard Jungle.

In which novel does 'Whiteman's Lady of the Evening" record get broken?
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A: John O'Hara novel, Appointment in Samarra

Problem: Economy of Greece:

In 2010 Piraeus handled 513,319 TEUs, followed by Thessaloniki, which handled 273,282 TEUs. In the same year, 83.9 million people passed through Greece's ports, 12.7 million through the port of Paloukia in Salamis, another 12.7 through the port of Perama, 9.5 million through Piraeus and 2.7 million through Igoumenitsa. In 2013, Piraeus handled a record 3.16 million TEUs, the third-largest figure in the Mediterranean, of which 2.52 million were transported through Pier II, owned by COSCO and 644,000 were transported through Pier I, owned by the Greek state.

How many TEUs did Piraeus remove in 2010?
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A: unanswerable

Problem: Czech language:

The consensus among linguists is that modern, standard Czech originated during the eighteenth century. By then the language had developed a literary tradition, and since then it has changed little; journals from that period have no substantial differences from modern standard Czech, and contemporary Czechs can understand them with little difficulty. Changes include the morphological shift of i to ej and e to i (although e survives for some uses) and the merging of i and the former eji. Sometime before the eighteenth century, the Czech language abandoned a distinction between phonemic /l/ and // which survives in Slovak.

How much difficulty do contemporary Czechs have in understanding material from the 18th century?
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A:
little