Article: The Revolutionary War soldier Nathan Hale (Yale 1773) was the prototype of the Yale ideal in the early 19th century: a manly yet aristocratic scholar, equally well-versed in knowledge and sports, and a patriot who "regretted" that he "had but one life to lose" for his country. Western painter Frederic Remington (Yale 1900) was an artist whose heroes gloried in combat and tests of strength in the Wild West. The fictional, turn-of-the-20th-century Yale man Frank Merriwell embodied the heroic ideal without racial prejudice, and his fictional successor Frank Stover in the novel Stover at Yale (1911) questioned the business mentality that had become prevalent at the school. Increasingly the students turned to athletic stars as their heroes, especially since winning the big game became the goal of the student body, and the alumni, as well as the team itself.

Question: What was Nathan Hale famous for?
Ans: Revolutionary War soldier


Here is a question about this article: Since the university's establishment in the city in 1837, the histories of the University of Michigan and Ann Arbor have been closely linked. The town became a regional transportation hub in 1839 with the arrival of the Michigan Central Railroad, and a north—south railway connecting Ann Arbor to Toledo and other markets to the south was established in 1878. Throughout the 1840s and the 1850s settlers continued to come to Ann Arbor. While the earlier settlers were primarily of British ancestry, the newer settlers also consisted of Germans, Irish, and African-Americans. In 1851, Ann Arbor was chartered as a city, though the city showed a drop in population during the Depression of 1873. It was not until the early 1880s that Ann Arbor again saw robust growth, with new immigrants coming from Greece, Italy, Russia, and Poland. Ann Arbor saw increased growth in manufacturing, particularly in milling. Ann Arbor's Jewish community also grew after the turn of the 20th century, and its first and oldest synagogue, Beth Israel Congregation, was established in 1916.
What is the answer to this question: Who were the early settlers of Ann Arbor?
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So... British


The problem: Answer a question about this article:
Bird migration routes have been studied by a variety of techniques including the oldest, marking. Swans have been marked with a nick on the beak since about 1560 in England. Scientific ringing was pioneered by Hans Christian Cornelius Mortensen in 1899. Other techniques include radar and satellite tracking.
What are other forms of studying migration?
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The answer: radar and satellite tracking


Problem: Please answer a question about the following article about Canadian Armed Forces:
Authorized headdress for the Canadian Armed Forces are the: beret, wedge cap, ballcap, Yukon cap, and tuque (toque). Each is coloured according to the distinctive uniform worn: navy (white or navy blue), army (rifle green or "regimental" colour), air force (light blue). Adherents of the Sikh faith may wear uniform turbans (dastar) (or patka, when operational) and Muslim women may wear uniform tucked hijabs under their authorized headdress. Jews may wear yarmulke under their authorized headdress and when bareheaded. The beret is probably the most widely worn headgear and is worn with almost all orders of dress (with the exception of the more formal orders of Navy and Air Force dress), and the colour of which is determined by the wearer's environment, branch, or mission. Naval personnel, however, seldom wear berets, preferring either service cap or authorized ballcaps (shipboard operational dress), which only the Navy wear. Air Force personnel, particularly officers, prefer the wedge cap to any other form of headdress. There is no naval variant of the wedge cap. The Yukon cap and tuque are worn only with winter dress, although clearance and combat divers may wear tuques year-round as a watch cap. Soldiers in Highland, Scottish, and Irish regiments generally wear alternative headdress, including the glengarry, balmoral, tam o'shanter, and caubeen instead of the beret. The officer cadets of both Royal Military Colleges wear gold-braided "pillbox" (cavalry) caps with their ceremonial dress and have a unique fur "Astrakhan" for winter wear. The Canadian Army wears the CG634 helmet.
What headdress does the Canadian Army wear?
A: CG634 helmet


Question: Read this and answer the question

In 1165 Maimonides visited Jerusalem and prayed on the Temple Mount, in the "great, holy house". In 1141 Spanish-Jewish poet, Yehuda Halevi, issued a call to the Jews to emigrate to the Land of Israel, a journey he undertook himself. In 1187 Sultan Saladin, founder of the Ayyubid dynasty, defeated the Crusaders in the Battle of Hattin and subsequently captured Jerusalem and almost all of Palestine. In time, Saladin issued a proclamation inviting Jews to return and settle in Jerusalem, and according to Judah al-Harizi, they did: "From the day the Arabs took Jerusalem, the Israelites inhabited it." Al-Harizi compared Saladin's decree allowing Jews to re-establish themselves in Jerusalem to the one issued by the Persian king Cyrus the Great over 1,600 years earlier.

Who was the founder of the Ayyubid dynasty?
Answer: Sultan Saladin


The quality of a vacuum is indicated by the amount of matter remaining in the system, so that a high quality vacuum is one with very little matter left in it. Vacuum is primarily measured by its absolute pressure, but a complete characterization requires further parameters, such as temperature and chemical composition. One of the most important parameters is the mean free path (MFP) of residual gases, which indicates the average distance that molecules will travel between collisions with each other. As the gas density decreases, the MFP increases, and when the MFP is longer than the chamber, pump, spacecraft, or other objects present, the continuum assumptions of fluid mechanics do not apply. This vacuum state is called high vacuum, and the study of fluid flows in this regime is called particle gas dynamics. The MFP of air at atmospheric pressure is very short, 70 nm, but at 100 mPa (~6997100000000000000♠1×10−3 Torr) the MFP of room temperature air is roughly 100 mm, which is on the order of everyday objects such as vacuum tubes. The Crookes radiometer turns when the MFP is larger than the size of the vanes.
What does the MFP of residual gases show?
average distance that molecules will travel between collisions with each other.