question: In 2012, fuel cell industry revenues exceeded $1 billion market value worldwide, with Asian pacific countries shipping more than 3/4 of the fuel cell systems worldwide. However, as of January 2014, no public company in the industry had yet become profitable. There were 140,000 fuel cell stacks shipped globally in 2010, up from 11,000 shipments in 2007, and from 2011 to 2012 worldwide fuel cell shipments had an annual growth rate of 85%. Tanaka Kikinzoku expanded its manufacturing facilities in 2011. Approximately 50% of fuel cell shipments in 2010 were stationary fuel cells, up from about a third in 2009, and the four dominant producers in the Fuel Cell Industry were the United States, Germany, Japan and South Korea. The Department of Energy Solid State Energy Conversion Alliance found that, as of January 2011, stationary fuel cells generated power at approximately $724 to $775 per kilowatt installed. In 2011, Bloom Energy, a major fuel cell supplier, said that its fuel cells generated power at 9-11 cents per kilowatt-hour, including the price of fuel, maintenance, and hardware.
Answer this question: How many dollars difference is there between the minimum and maximum number of dollars per kilowatts installed in January 2011?
answer: 51

question: Francis I of France had continued his policy of seeking a middle course in the religious rift in France until an incident called the Affair of the Placards.  The Affair of the Placards began in 1534, and started with protesters putting up anti-Catholic posters. The posters were not Lutheran but were Zwinglian or "Sacramentarian" in the extreme nature of the anti-Catholic content—specifically, the absolute rejection of the Catholic doctrine of "Real Presence."  Protestantism became identified as "a religion of rebels," helping the Catholic Church to more easily define Protestantism as heresy. In the wake of the posters, the French monarchy took a harder stand against the protesters. Francis had been severely criticized for his initial tolerance towards Protestants, and now was encouraged to repress them.  At the same time, Francis was working on a policy of alliance with the Ottoman Empire.  The ambassadors in the 1534 Ottoman embassy to France accompanied Francis to Paris.  They attended the execution by burning at the stake of those caught for the Affair of the Placards, on 21 January 1535, in front of the Cathedral of Notre-Dame de Paris. John Calvin, a Frenchman, escaped from the persecution to Basle, Switzerland, where he published the Institutes of the Christian Religion in 1536. In the same year, he visited Geneva, but was forced out for trying to reform the church. When he returned by invitation in 1541, he wrote the Ecclesiastical ordinances, the constitution for a Genevan church, which was passed by the council of Geneva.
Answer this question: Which event happened first, the Affair of the Placards or the return to Geneva by John Calvin?
answer: Affair of the Placards

question: This broadcast was the last for NBC as the American Football Conference network after 33 years (CBS has held the AFC broadcast rights ever since), their last NFL broadcast overall until 2006 NFL season, when they signed on to televise NBC Sunday Night Football, and their last Super Bowl broadcast until 2009 (Super Bowl XLIII). This was also the last time Channel 4 in the United Kingdom would show the Super Bowl - and their last NFL coverage until 2010 - after they had been showing the event since 1983 (Super Bowl XVII). Only Sky Sports would show it live until Channel 5 (UK) joined them in 2003 (Super Bowl XXXVII).  It also marked the last Super Bowl until 2007 for CTV Television Network in Canada after airing the NFL and the event since Super Bowl XVI; from 1999 to 2006 the Super Bowl aired on the Global Television Network.  CTV had aired NFL football since 1970 and the Super Bowl since 1982 (Super Bowl XVI).  It was also the final NFL game for GMA Network in the Philippines until the 2006 NFL Season; GMA had aired NFL football since 1986 NFL season and the Super Bowl since Super Bowl XXI in 1987.  The Super Bowl would be broadcast on TV5 (Philippines), also from 1999 until 2006.  It was also the final Super Bowl in which the Televisa family of networks aired on its own in Mexico, also until 2007, being broadcast on Canal 5 (Televisa Network); Televisa had aired NFL football since 1970 and the Super Bowl since 1988 (at the time, Super Bowl XXII). Azteca 13 likewise would exclusively air the Super Bowl from 1999 until 2006, including Super Bowl XXXVII which would be the next Super Bowl to be played at Qualcomm Stadium.
Answer this question: How many years did Azteca 13 air the Super Bowl for?
answer:
7