Problem: Frederic Chopin:

Friederike Muller, a pupil of Chopin, wrote: "[His] playing was always noble and beautiful; his tones sang, whether in full forte or softest piano. He took infinite pains to teach his pupils this legato, cantabile style of playing. His most severe criticism was 'Heor shedoes not know how to join two notes together.' He also demanded the strictest adherence to rhythm. He hated all lingering and dragging, misplaced rubatos, as well as exaggerated ritardandos ... and it is precisely in this respect that people make such terrible errors in playing his works."

According to Friederike Muller, Chopin insisted his students have the strictest adherence to what?
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A: rhythm.

Problem: Little is known about the bacteria that degrade cellulose. Symbiotic bacteria in Xylophaga may play a role in the degradation of sunken wood; while bacteria such as Alphaproteobacteria, Flavobacteria, Actinobacteria, Clostridia, and Bacteroidetes have been detected in wood submerged over a year.
What component of wood is degraded by bacteria that scientists are still trying to learn about?
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Answer: cellulose

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
A database built with one DBMS is not portable to another DBMS (i.e., the other DBMS cannot run it). However, in some situations it is desirable to move, migrate a database from one DBMS to another. The reasons are primarily economical (different DBMSs may have different total costs of ownership or TCOs), functional, and operational (different DBMSs may have different capabilities). The migration involves the database's transformation from one DBMS type to another. The transformation should maintain (if possible) the database related application (i.e., all related application programs) intact. Thus, the database's conceptual and external architectural levels should be maintained in the transformation. It may be desired that also some aspects of the architecture internal level are maintained. A complex or large database migration may be a complicated and costly (one-time) project by itself, which should be factored into the decision to migrate. This in spite of the fact that tools may exist to help migration between specific DBMSs. Typically a DBMS vendor provides tools to help importing databases from other popular DBMSs.
What is portable from one DBMS to another?
A: unanswerable

Context and question: This office was first held by Gabriel Nicolas de la Reynie, who had 44 commissaires de police (police commissioners) under his authority. In 1709, these commissioners were assisted by inspecteurs de police (police inspectors). The city of Paris was divided into 16 districts policed by the commissaires, each assigned to a particular district and assisted by a growing bureaucracy. The scheme of the Paris police force was extended to the rest of France by a royal edict of October 1699, resulting in the creation of lieutenants general of police in all large French cities and towns.
When were police inspectors subtracted from Paris's police?
Answer: unanswerable

Question: Additionally, owing to its colonial history, cuisine in Eritrea features more Italian influences than are present in Ethiopian cooking, including more pasta and greater use of curry powders and cumin.The Italian Eritrean cuisine started to be practiced during the colonial times of the Kingdom of Italy, when a large number of Italians moved to Eritrea. They brought the use of "pasta" to Italian Eritrea, and it is one of the main food eaten in present-day Asmara. An Italian Eritrean cuisine emerged, and dishes common dishes are 'Pasta al Sugo e Berbere', which means "Pasta with tomato sauce and berbere" (spice), but there are many more like "lasagna" and "cotoletta alla milanese" (milano cutlet). Alongside sowa, people in Eritrea also tend to drink coffee. Mies is another popular local alcoholic beverage, made out of honey.
Is there an answer to this question: What is a popular alcoholic drink in Ethiopia?

Answer: unanswerable

Problem: Slavs:

Present-day Slavic people are classified into West Slavic (chiefly Poles, Czechs and Slovaks), East Slavic (chiefly Russians, Belarusians, and Ukrainians), and South Slavic (chiefly Serbs, Bulgarians, Croats, Bosniaks, Macedonians, Slovenes, and Montenegrins), though sometimes the West Slavs and East Slavs are combined into a single group known as North Slavs. For a more comprehensive list, see the ethnocultural subdivisions. Modern Slavic nations and ethnic groups are considerably diverse both genetically and culturally, and relations between them even within the individual ethnic groups themselves are varied, ranging from a sense of connection to mutual feelings of hostility.

East Slavic people consist of which nationalities?
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A:
Russians, Belarusians, and Ukrainians