Question: Black labor played a crucial role in Miami's early development. During the beginning of the 20th century, migrants from the Bahamas and African-Americans constituted 40 percent of the city's population. Whatever their role in the city's growth, their community's growth was limited to a small space. When landlords began to rent homes to African-Americans in neighborhoods close to Avenue J (what would later become NW Fifth Avenue), a gang of white man with torches visited the renting families and warned them to move or be bombed.
Try to answer this question if possible: In the early 1900s, what percentage of Miami's population was of African origin?
Answer: 40
Question: In 2013, however, a study of Ashkenazi mitochondrial DNA by a team led by Martin B. Richards of the University of Huddersfield in England reached different conclusions, again corroborating the pre-2006 origin hypothesis. Testing was performed on the full 16,600 DNA units composing mitochondrial DNA (the 2006 Behar study had only tested 1,000 units) in all their subjects, and the study found that the four main female Ashkenazi founders had descent lines that were established in Europe 10,000 to 20,000 years in the past while most of the remaining minor founders also have a deep European ancestry. The study states that the great majority of Ashkenazi maternal lineages were not brought from the Near East (i.e., they were non-Israelite), nor were they recruited in the Caucasus (i.e., they were non-Khazar), but instead they were assimilated within Europe, primarily of Italian and Old French origins. Richards summarized the findings on the female line as such: "[N]one [of the mtDNA] came from the North Caucasus, located along the border between Europe and Asia between the Black and Caspian seas. All of our presently available studies including my own, should thoroughly debunk one of the most questionable, but still tenacious, hypotheses: that most Ashkenazi Jews can trace their roots to the mysterious Khazar Kingdom that flourished during the ninth century in the region between the Byzantine Empire and the Persian Empire." The 2013 study estimated that 80 percent of Ashkenazi maternal ancestry comes from women indigenous to Europe, and only 8 percent from the Near East, while the origin of the remainder is undetermined. According to the study these findings "point to a significant role for the conversion of women in the formation of Ashkenazi communities."
Try to answer this question if possible: A 2013 study estimates that what percentage of Ashkenazi maternal ancestry comes from women of undetermined origins?
Answer: while the origin of the remainder is undetermined
Question: Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered a plentiful resource, the exceptions highlight the importance of solar energy to agriculture. During the short growing seasons of the Little Ice Age, French and English farmers employed fruit walls to maximize the collection of solar energy. These walls acted as thermal masses and accelerated ripening by keeping plants warm. Early fruit walls were built perpendicular to the ground and facing south, but over time, sloping walls were developed to make better use of sunlight. In 1699, Nicolas Fatio de Duillier even suggested using a tracking mechanism which could pivot to follow the Sun. Applications of solar energy in agriculture aside from growing crops include pumping water, drying crops, brooding chicks and drying chicken manure. More recently the technology has been embraced by vinters, who use the energy generated by solar panels to power grape presses.
Try to answer this question if possible: What was the purpose of the fruit walls built by French and English farmers?
Answer: acted as thermal masses and accelerated ripening by keeping plants warm
Question: Among the first to study Russian dialects was Lomonosov in the 18th century. In the 19th, Vladimir Dal compiled the first dictionary that included dialectal vocabulary. Detailed mapping of Russian dialects began at the turn of the 20th century. In modern times, the monumental Dialectological Atlas of the Russian Language ( [dlktlitskj atls ruskv jzka]), was published in three folio volumes 19861989, after four decades of preparatory work.
Try to answer this question if possible: When did Lomonosov map Russian dialects?
Answer:
unanswerable