Problem: Chihuahua (state):

La Cueva De Las Ventanas (The Cave of Windows), a series of cliff dwellings along an important trade route, and Las Jarillas Cave scrambled along the canyons of the Sierra Madre in Northwestern Chihuahua date between AD 1205 and 1260 and belong to the Paquime culture. Cuarenta Casas is thought to have been a branch settlement from Paquime to protect the trade route from attack. Archaeologists believe the civilization began to decline during the 13th century and by the 15th century the inhabitants of Paquime sought refuge in the Sierra Madre Occidental while others are thought to have emigrated north and joined the Ancestral Pueblo peoples. According to anthropologist current natives tribes (Yaqui, Mayo, Opata, and Tarahumara) are descendants of the Casas Grandes culture.

Which current native tribes are thought to be descendants of the Casas Grandes?
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A: Yaqui, Mayo, Opata, and Tarahumara

Problem: The phonautograph, patented by Leon Scott in 1857, used a vibrating diaphragm and stylus to graphically record sound waves as tracings on sheets of paper, purely for visual analysis and without any intent of playing them back. In the 2000s, these tracings were first scanned by audio engineers and digitally converted into audible sound. Phonautograms of singing and speech made by Scott in 1860 were played back as sound for the first time in 2008. Along with a tuning fork tone and unintelligible snippets recorded as early as 1857, these are the earliest known recordings of sound.
By whom was the phonautograms patented?
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Answer: Leon Scott

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Meteorites from Antarctica are an important area of study of material formed early in the solar system; most are thought to come from asteroids, but some may have originated on larger planets. The first meteorite was found in 1912, and named the Adelie Land meteorite. In 1969, a Japanese expedition discovered nine meteorites. Most of these meteorites have fallen onto the ice sheet in the last million years. Motion of the ice sheet tends to concentrate the meteorites at blocking locations such as mountain ranges, with wind erosion bringing them to the surface after centuries beneath accumulated snowfall. Compared with meteorites collected in more temperate regions on Earth, the Antarctic meteorites are well-preserved.
When was the first meteorite found in Antarctica?
A: 1912

Context and question: Most wrestling matches last for a set number of falls, with the first side to achieve the majority number of pinfalls, submissions, or countouts being the winner. Historically, matches were wrestled to 3 falls ("best 2 out of 3") or 5 falls ("best 3 out of 5"). The standard for modern matches is one fall. However, even though it is now standard, many announcers will explicitly state this (e.g. "The following contest is set for one fall with a 20-minute time limit"). These matches are given a time limit; if not enough falls are scored by the end of the time limit, the match is declared a draw. Modern matches are generally given a 10- to 30-minute time limit for standard matches; title matches can go for up to one hour. British wrestling matches held under Admiral-Lord Mountevans rules are 2 out of 3 falls.
In what instance will a match be declared a draw?
Answer: if not enough falls are scored by the end of the time limit, the match is declared a draw.

Question: Buddhism /budzm/ is a nontheistic religion[note 1] or philosophy (Sanskrit: dharma; Pali: dhamma) that encompasses a variety of traditions, beliefs and spiritual practices largely based on teachings attributed to Gautama Buddha, commonly known as the Buddha ("the awakened one"). According to Buddhist tradition, the Buddha lived and taught in the eastern part of the Indian subcontinent, present-day Nepal sometime between the 6th and 4th centuries BCE.[note 1] He is recognized by Buddhists as an awakened or enlightened teacher who shared his insights to help sentient beings end their suffering through the elimination of ignorance and craving. Buddhists believe that this is accomplished through the direct understanding and perception of dependent origination and the Four Noble Truths.
Is there an answer to this question: Who's teachings is Buddhism based upon?

Answer: Gautama Buddha

Problem: Biodiversity:

A 2007 study conducted by the National Science Foundation found that biodiversity and genetic diversity are codependentthat diversity among species requires diversity within a species, and vice versa. "If any one type is removed from the system, the cycle can break down, and the community becomes dominated by a single species." At present, the most threatened ecosystems are found in fresh water, according to the Millennium Ecosystem Assessment 2005, which was confirmed by the "Freshwater Animal Diversity Assessment", organised by the biodiversity platform, and the French Institut de recherche pour le developpement (MNHNP).

Who conducted the 2000 study?
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A:
unanswerable