The problem: Answer a question about this article:
In 1849, Dr. Abraham Gesner, a Canadian geologist, devised a method where kerosene could be distilled from petroleum. Earlier coal-gas methods had been used for lighting since the 1820s, but they were expensive. Gesner's kerosene was cheap, easy to produce, could be burned in existing lamps, and did not produce an offensive odor as did most whale oil. It could be stored indefinitely, unlike whale oil, which would eventually spoil. The American petroleum boom began in the 1850s. By the end of the decade there were 30 kerosene plants operating in the United States. The cheaper, more efficient fuel began to drive whale oil out of the market. John D. Rockefeller was most responsible for the commercial success of kerosene. He set up a network of kerosene distilleries which would later become Standard Oil, thus completely abolishing the need for whale-oil lamps. These types of lamps may catch fire or emit carbon-monoxide and sometimes are odorous making them problematic for asthmatic people.
What method of lighting have been used since 1820s?
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The answer: coal-gas methods


The problem: Answer a question about this article:
The American Lunar Module was finally ready for a successful piloted test flight in low Earth orbit on Apollo 9 in March 1969. The next mission, Apollo 10, conducted a "dress rehearsal" for the first landing in May 1969, flying the LM in lunar orbit as close as 47,400 feet (14.4 km) above the surface, the point where the powered descent to the surface would begin. With the LM proven to work well, the next step was to attempt the actual landing.
The Lunar Module completed its first low Earth orbit on what date?
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The answer: March 1969


The problem: Answer a question about this article:
Industrialized societies generally follow a clock-based schedule for daily activities that do not change throughout the course of the year. The time of day that individuals begin and end work or school, and the coordination of mass transit, for example, usually remain constant year-round. In contrast, an agrarian society's daily routines for work and personal conduct are more likely governed by the length of daylight hours and by solar time, which change seasonally because of the Earth's axial tilt. North and south of the tropics daylight lasts longer in summer and shorter in winter, the effect becoming greater as one moves away from the tropics.
What kind of societies usually follow a regular daily schedule year-round?
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The answer: Industrialized


The problem: Answer a question about this article:
The Gross Domestic Product (GDP) of Florida in 2010 was $748 billion. Its GDP is the fourth largest economy in the United States. In 2010, it became the fourth largest exporter of trade goods. The major contributors to the state's gross output in 2007 were general services, financial services, trade, transportation and public utilities, manufacturing and construction respectively. In 2010–11, the state budget was $70.5 billion, having reached a high of $73.8 billion in 2006–07. Chief Executive Magazine name Florida the third "Best State for Business" in 2011.
Where does Florida's GDP rank 
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The answer:
Its GDP is the fourth largest economy in the United States