Problem: Infection:

Resistance to infection (immunity) may be acquired following a disease, by asymptomatic carriage of the pathogen, by harboring an organism with a similar structure (crossreacting), or by vaccination. Knowledge of the protective antigens and specific acquired host immune factors is more complete for primary pathogens than for opportunistic pathogens. There is also the phenomenon of herd immunity which offers a measure of protection to those otherwise vulnerable people when a large enough proportion of the population has acquired immunity from certain infections.

What is knowledge of protective antigens more complete for?
---
A: primary pathogens


Problem: Pope Paul VI:

In 1964, Paul VI created a Secretariat for non-Christians, later renamed the Pontifical Council for Interreligious Dialogue and a year later a new Secretariat (later Pontifical Council) for Dialogue with Non-Believers. This latter was in 1993 incorporated by Pope John Paul II in the Pontifical Council for Culture, which he had established in 1982. In 1971, Paul VI created a papal office for economic development and catastrophic assistance. To foster common bonds with all persons of good will, he decreed an annual peace day to be celebrated on January first of every year. Trying to improve the condition of Christians behind the Iron Curtain, Paul VI engaged in dialogue with Communist authorities at several levels, receiving Foreign Minister Andrei Gromyko and Chairman of the Presidium of the Supreme Soviet Nikolai Podgorny in 1966 and 1967 in the Vatican. The situation of the Church in Hungary, Poland and Romania, improved during his pontificate.

What was the Secretariat for non-believers eventually renamed?
---
A: Pontifical Council for Interreligious Dialogue


Problem: Federalism:

Federalism refers to the mixed or compound mode of government, combining a general government (the central or 'federal' government) with regional governments (provincial, state, Land, cantonal, territorial or other sub-unit governments) in a single political system. Its distinctive feature, exemplified in the founding example of modern federalism of the United States of America under the Constitution of 1789, is a relationship of parity between the two levels of government established. It can thus be defined as a form of government in which there is a division of powers between two levels of government of equal status.

What distinguishes Federalism from no other types of government?
---
A: unanswerable


Problem: Universal Studios:

Universal owned the rights to the "Oswald the Lucky Rabbit" character, although Walt Disney and Ub Iwerks had created Oswald, and their films had enjoyed a successful theatrical run. After Charles Mintz had unsuccessfully demanded that Disney accept a lower fee for producing the property, Mintz produced the films with his own group of animators. Instead, Disney and Iwerks created Mickey Mouse who in 1928 stared in the first "sync" sound animated short, Steamboat Willie. This moment effectively launched Walt Disney Studios' foothold, while Universal became a minor player in film animation. Universal subsequently severed its link to Mintz and formed its own in-house animation studio to produce Oswald cartoons headed by Walter Lantz.

Who owned the rights to Oswald the Rabbit?
---
A:
unanswerable