Problem: Question: "What exactly is jnd?" Context: "The just-noticeable difference (jnd) (the threshold at which a change is perceived) depends on the tone's frequency content. Below 500 Hz, the jnd is about 3 Hz for sine waves, and 1 Hz for complex tones; above 1000 Hz, the jnd for sine waves is about 0.6% (about 10 cents). The jnd is typically tested by playing two tones in quick succession with the listener asked if there was a difference in their pitches. The jnd becomes smaller if the two tones are played simultaneously as the listener is then able to discern beat frequencies. The total number of perceptible pitch steps in the range of human hearing is about 1,400; the total number of notes in the equal-tempered scale, from 16 to 16,000 Hz, is 120." Answer:

A: threshold at which a change is perceived

Problem: Given the question: Question: "What causes the weather?" Context: "Annual precipitation is 40 inches (1,020 mm) which is fairly spread throughout the year. Owing to its proximity to the Atlantic Ocean and its location in South Jersey, Atlantic City receives less snow than a good portion of the rest of New Jersey. Even at the airport, where low temperatures are often much lower than along the coast, snow averages only 16.5 inches (41.9 cm) each winter. It is very common for rain to fall in Atlantic City while the northern and western parts of the state are receiving snow." Answer:
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The answer is:
Atlantic Ocean and its location in South Jersey

input question: Question: "In the United Kingdom, what is the status of antibiotics used in animal feed?" Context: "The emergence of antibiotic resistance has prompted restrictions on their use in the UK in 1970 (Swann report 1969), and the EU has banned the use of antibiotics as growth-promotional agents since 2003. Moreover, several organizations (e.g., The American Society for Microbiology (ASM), American Public Health Association (APHA) and the American Medical Association (AMA)) have called for restrictions on antibiotic use in food animal production and an end to all nontherapeutic uses.[citation needed] However, commonly there are delays in regulatory and legislative actions to limit the use of antibiotics, attributable partly to resistance against such regulation by industries using or selling antibiotics, and to the time required for research to test causal links between their use and resistance to them. Two federal bills (S.742 and H.R. 2562) aimed at phasing out nontherapeutic use of antibiotics in US food animals were proposed, but have not passed. These bills were endorsed by public health and medical organizations, including the American Holistic Nurses' Association, the American Medical Association, and the American Public Health Association (APHA)." Answer:???
output answer: restrictions on their use

Question: "what is the oldest school grade mentioned in the text" Context: "A dense wave of smog began in the Central and Eastern part of China on 2 December 2013 across a distance of around 1,200 kilometres (750 mi), including Tianjin, Hebei, Shandong, Jiangsu, Anhui, Shanghai and Zhejiang. A lack of cold air flow, combined with slow-moving air masses carrying industrial emissions, collected airborne pollutants to form a thick layer of smog over the region. The heavy smog heavily polluted central and southern Jiangsu Province, especially in and around Nanjing, with its AQI pollution Index at "severely polluted" for five straight days and "heavily polluted" for nine. On 3 December 2013, levels of PM2.5 particulate matter average over 943 micrograms per cubic metre, falling to over 338 micrograms per cubic metre on 4 December 2013. Between 3:00 pm, 3 December and 2:00pm, 4 December local time, several expressways from Nanjing to other Jiangsu cities were closed, stranding dozens of passenger buses in Zhongyangmen bus station. From 5 to 6 December, Nanjing issued a red alert for air pollution and closed down all kindergarten through middle schools. Children's Hospital outpatient services increased by 33 percent; general incidence of bronchitis, pneumonia, upper respiratory tract infections significantly increased. The smog dissipated 12 December. Officials blamed the dense pollution on lack of wind, automobile exhaust emissions under low air pressure, and coal-powered district heating system in North China region. Prevailing winds blew low-hanging air masses of factory emissions (mostly SO2) towards China's east coast." Answer:
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Answer: middle schools

Q: Question: "How is this religion similar to others?" Context: "Baptism is a requirement for being considered a member of Jehovah's Witnesses. Jehovah's Witnesses do not practice infant baptism, and previous baptisms performed by other denominations are not considered valid. Individuals undergoing baptism must affirm publicly that dedication and baptism identify them "as one of Jehovah's Witnesses in association with God's spirit-directed organization," though Witness publications say baptism symbolizes personal dedication to God and not "to a man, work or organization." Their literature emphasizes the need for members to be obedient and loyal to Jehovah and to "his organization,"[note 2] stating that individuals must remain part of it to receive God's favor and to survive Armageddon." Answer:
A: Baptism is a requirement for being considered a member of Jehovah's Witnesses

[Q]: Question: "What advantage did the 20th century lack?" Context: "Over the course of the 20th century, the world's per-capita gross domestic product grew by a factor of five, much more than all earlier centuries combined (including the 19th with its Industrial Revolution). Many economists make the case that this understates the magnitude of growth, as many of the goods and services consumed at the end of the 20th century, such as improved medicine (causing world life expectancy to increase by more than two decades) and communications technologies, were not available at any price at its beginning. However, the gulf between the world's rich and poor grew wider, and the majority of the global population remained in the poor side of the divide." Answer:
****
[A]:
Industrial Revolution