Article: The second approach to the problem took as its base the notion of class, and defines a set as a class which belongs to other classes, while a proper class is defined as a class which does not belong to other classes. Under the ZermeloFraenkel approach, the axioms impede the construction of a set of all sets which do not belong to themselves. In contrast, under the von Neumann approach, the class of all sets which do not belong to themselves can be constructed, but it is a proper class and not a set.

Question: Under what approach does an axiom impede a set of all sets which do not belong to themselves?
Ans: ZermeloFraenkel

Article: Many Muslims criticized the Umayyads for having too many non-Muslim, former Roman administrators in their government. St John of Damascus was also a high administrator in the Umayyad administration. As the Muslims took over cities, they left the peoples political representatives and the Roman tax collectors and the administrators. The taxes to the central government were calculated and negotiated by the peoples political representatives. The Central government got paid for the services it provided and the local government got the money for the services it provided. Many Christian cities also used some of the taxes on maintain their churches and run their own organizations. Later the Umayyads were criticized by some Muslims for not reducing the taxes of the people who converted to Islam. These new converts continues to pay the same taxes that were previously negotiated.

Question: What tax collectors did the Umayyads often leave in place after they conquered regions?
Ans: Roman

Article: From the 2011 Census, the Office for National Statistics published that Plymouth's unitary authority area population was 256,384; 15,664 more people than that of the last census from 2001, which indicated that Plymouth had a population of 240,720. The Plymouth urban area had a population of 260,203 in 2011 (the urban sprawl which extends outside the authority's boundaries). The city's average household size was 2.3 persons. At the time of the 2011 UK census, the ethnic composition of Plymouth's population was 96.2% White (of 92.9% was White British), with the largest minority ethnic group being Chinese at 0.5%. The white Irish ethnic group saw the largest decline in its share of the population since the 2001 Census (-24%), while the Other Asian and Black African had the largest increases (360% and 351% respectively). This excludes the two new ethnic groups added to the 2011 census of Gypsy or Irish Traveller and Arab. The population rose rapidly during the second half of the 19th century, but declined by over 1.6% from 1931 to 1951.

Question: How many people did the Plymouth unitary authority gain between 2001 and 2011?
Ans: 15,664

Article: The creation of the Federal Republic of Germany in 1949 was through the unification of the western states (which were previously under American, British, and French administration) created in the aftermath of World War II. Initially, in 1949, the states of the Federal Republic were Baden, Bavaria (in German: Bayern), Bremen, Hamburg, Hesse (Hessen), Lower Saxony (Niedersachsen), North Rhine Westphalia (Nordrhein-Westfalen), Rhineland-Palatinate (Rheinland-Pfalz), Schleswig-Holstein, Wurttemberg-Baden, and Wurttemberg-Hohenzollern. West Berlin, while officially not part of the Federal Republic, was largely integrated and considered as a de facto state.

Question: What was the Federal Republic of Germany created in the aftermath of?
Ans:
World War II