Problem: Videoconferencing:

In May 2005, the first high definition video conferencing systems, produced by LifeSize Communications, were displayed at the Interop trade show in Las Vegas, Nevada, able to provide video at 30 frames per second with a 1280 by 720 display resolution. Polycom introduced its first high definition video conferencing system to the market in 2006. As of the 2010s, high definition resolution for videoconferencing became a popular feature, with most major suppliers in the videoconferencing market offering it.

What was the resolution of the first HD video conferencing system?
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A: 1280 by 720

Problem: Estonian language:

In Estonian, nouns and pronouns do not have grammatical gender, but nouns and adjectives decline in fourteen cases: nominative, genitive, partitive, illative, inessive, elative, allative, adessive, ablative, translative, terminative, essive, abessive, and comitative, with the case and number of the adjective(s) always agreeing with that of the noun (except in the terminative, essive, abessive and comitative, where there is agreement only for the number, the adjective being in the genitive form). Thus the illative for kollane maja ("a yellow house") is kollasesse majja ("into a yellow house"), but the terminative is kollase majani ("as far as a yellow house"). With respect to the Proto-Finnic language, elision has occurred; thus, the actual case marker may be absent, but the stem is changed, cf. maja majja and the Pohjanmaa dialect of Finnish maja majahan.

What is "a yellow house" in Finnish?
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A: unanswerable

Problem: Protestantism:

Following the excommunication of Luther and condemnation of the Reformation by the Pope, the work and writings of John Calvin were influential in establishing a loose consensus among various groups in Switzerland, Scotland, Hungary, Germany and elsewhere. After the expulsion of its Bishop in 1526, and the unsuccessful attempts of the Bern reformer William Farel, Calvin was asked to use the organisational skill he had gathered as a student of law to discipline the "fallen city" of Geneva. His Ordinances of 1541 involved a collaboration of Church affairs with the City council and consistory to bring morality to all areas of life. After the establishment of the Geneva academy in 1559, Geneva became the unofficial capital of the Protestant movement, providing refuge for Protestant exiles from all over Europe and educating them as Calvinist missionaries. The faith continued to spread after Calvin's death in 1563.

Who wrote the Ordinances of 1541?
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A: John Calvin

Problem: Pesticide:

Alternatives to pesticides are available and include methods of cultivation, use of biological pest controls (such as pheromones and microbial pesticides), genetic engineering, and methods of interfering with insect breeding. Application of composted yard waste has also been used as a way of controlling pests. These methods are becoming increasingly popular and often are safer than traditional chemical pesticides. In addition, EPA is registering reduced-risk conventional pesticides in increasing numbers.

What is one thing that can be used in place of pesticides?
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A:
methods of cultivation