Problem: Transistor:

The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. First conceived by Julius Lilienfeld in 1926 and practically implemented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley, the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things. The transistor is on the list of IEEE milestones in electronics, and Bardeen, Brattain, and Shockley shared the 1956 Nobel Prize in Physics for their achievement.

When was the first transistor created?
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A: 1926

Problem: The BBC's highlights package on Saturday and Sunday nights, as well as other evenings when fixtures justify, will run until 2016. Television rights alone for the period 2010 to 2013 have been purchased for 1.782 billion. On 22 June 2009, due to troubles encountered by Setanta Sports after it failed to meet a final deadline over a 30 million payment to the Premier League, ESPN was awarded two packages of UK rights containing a total of 46 matches that were available for the 200910 season as well as a package of 23 matches per season from 201011 to 201213. On 13 June 2012, the Premier League announced that BT had been awarded 38 games a season for the 201314 through 201516 seasons at 246 million-a-year. The remaining 116 games were retained by Sky who paid 760 million-a-year. The total domestic rights have raised 3.018 billion, an increase of 70.2% over the 201011 to 201213 rights. The value of the licensing deal rose by another 70.2% in 2015, when Sky and BT paid a total of 5.136 billion to renew their contracts with the Premier League for another three years up to the 201819 season.
When will the BBC's weekend highlights package run out?
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Answer: 2016

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The judges continue in paragraph 12, "The determination of when the targeted part is substantial enough to meet this requirement may involve a number of considerations. The numeric size of the targeted part of the group is the necessary and important starting point, though not in all cases the ending point of the inquiry. The number of individuals targeted should be evaluated not only in absolute terms, but also in relation to the overall size of the entire group. In addition to the numeric size of the targeted portion, its prominence within the group can be a useful consideration. If a specific part of the group is emblematic of the overall group, or is essential to its survival, that may support a finding that the part qualifies as substantial within the meaning of Article 4 [of the Tribunal's Statute]."
What is the key aspect of the targeted part of the group at the absolute term?
A: unanswerable

Context and question: Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate collectors (34%) generally used for domestic hot water; and unglazed plastic collectors (21%) used mainly to heat swimming pools.
How much hot water can be produced by solar heating systems in low geographical latitudes?
Answer: 60 to 70% of the domestic hot water

Question: Airports may also contain premium and VIP services. The premium and VIP services may include express check-in and dedicated check-in counters. These services are usually reserved for First and Business class passengers, premium frequent flyers, and members of the airline's clubs. Premium services may sometimes be open to passengers who are members of a different airline's frequent flyer program. This can sometimes be part of a reciprocal deal, as when multiple airlines are part of the same alliance, or as a ploy to attract premium customers away from rival airlines.
Is there an answer to this question: What are two groups that are usually in the frequent flyer program?

Answer: unanswerable

Question: Although an alloy is technically an impure metal, when referring to alloys, the term "impurities" usually denotes those elements which are not desired. These impurities are often found in the base metals or the solutes, but they may also be introduced during the alloying process. For instance, sulfur is a common impurity in steel. Sulfur combines readily with iron to form iron sulfide, which is very brittle, creating weak spots in the steel. Lithium, sodium and calcium are common impurities in aluminium alloys, which can have adverse effects on the structural integrity of castings. Conversely, otherwise pure-metals that simply contain unwanted impurities are often called "impure metals" and are not usually referred to as alloys. Oxygen, present in the air, readily combines with most metals to form metal oxides; especially at higher temperatures encountered during alloying. Great care is often taken during the alloying process to remove excess impurities, using fluxes, chemical additives, or other methods of extractive metallurgy.
Is there an answer to this question: Using fluxes and chemical additives during the alloying process does what?

Answer:
remove excess impurities