Problem: Wayback Machine:

In a 2009 case, Netbula, LLC v. Chordiant Software Inc., defendant Chordiant filed a motion to compel Netbula to disable the robots.txt file on its web site that was causing the Wayback Machine to retroactively remove access to previous versions of pages it had archived from Nebula's site, pages that Chordiant believed would support its case.

What 2009 court battle involved Netbula's robots?
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A: unanswerable

Problem: The Bulgarian Empire was in decline by the 14th century, and the ascendancy of Serbia was marked by the Serbian victory over the Bulgarians in the Battle of Velbazhd in 1330. By 1346, the Serbian king Stefan Dusan had been proclaimed emperor. Yet Serbian dominance was short-lived; the Serbian army led by the Lazar Hrebljevanovic was defeated by the Ottomans at the Battle of Kosovo in 1389, where most of the Serbian nobility was killed and the south of the country came under Ottoman occupation, as much of southern Bulgaria had become Ottoman territory in 1371. Northern remnants of Bulgaria were finally conquered by 1396, Serbia fell in 1459, Bosnia in 1463, and Albania was finally subordinated in 1479 only a few years after the death of Skanderbeg. Belgrade, an Hungarian domain at the time, was the last large Balkan city to fall under Ottoman rule, in 1521. By the end of the medieval period, the entire Balkan peninsula was annexed by, or became vassal to, the Ottomans.
In what year was the Battle of Kosovo?
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Answer: 1389

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The five Great Lakes are located in the north-central portion of the country, four of them forming part of the border with Canada, only Lake Michigan situated entirely within United States. The southeast United States contain subtropical forests and, near the gulf coast, mangrove wetlands, especially in Florida. West of the Appalachians lies the Mississippi River basin and two large eastern tributaries, the Ohio River and the Tennessee River. The Ohio and Tennessee Valleys and the Midwest consist largely of rolling hills and productive farmland, stretching south to the Gulf Coast.
What type of land makes up the Ohio and Tennessee valleys?
A: rolling hills and productive farmland

Context and question: Liberia has a long, rich history in textile arts and quilting, as the settlers brought with them their sewing and quilting skills. Liberia hosted National Fairs in 1857 and 1858 in which prizes were awarded for various needle arts. One of the most well-known Liberian quilters was Martha Ann Ricks, who presented a quilt featuring the famed Liberian coffee tree to Queen Victoria in 1892. When President Ellen Johnson Sirleaf moved into the Executive Mansion, she reportedly had a Liberian-made quilt installed in her presidential office.
Who did Martha Ann Ricks present the famed Liberian coffee tree to?
Answer: Queen Victoria

Question: In 2005, Beyonce teamed up with House of Brands, a shoe company, to produce a range of footwear for House of Dereon. In January 2008, Starwave Mobile launched Beyonce Fashion Diva, a "high-style" mobile game with a social networking component, featuring the House of Dereon collection. In July 2009, Beyonce and her mother launched a new junior apparel label, Sasha Fierce for Dereon, for back-to-school selling. The collection included sportswear, outerwear, handbags, footwear, eyewear, lingerie and jewelry. It was available at department stores including Macy's and Dillard's, and specialty stores Jimmy Jazz and Against All Odds. On May 27, 2010, Beyonce teamed up with clothing store C&A to launch Dereon by Beyonce at their stores in Brazil. The collection included tailored blazers with padded shoulders, little black dresses, embroidered tops and shirts and bandage dresses.
Is there an answer to this question: What type of accessory company did Beyonce partner with in 2005?

Answer: shoe

Question: The first law of thermodynamics asserts that energy (but not necessarily thermodynamic free energy) is always conserved and that heat flow is a form of energy transfer. For homogeneous systems, with a well-defined temperature and pressure, a commonly used corollary of the first law is that, for a system subject only to pressure forces and heat transfer (e.g., a cylinder-full of gas) without chemical changes, the differential change in the internal energy of the system (with a gain in energy signified by a positive quantity) is given as
Is there an answer to this question: What asserts that energy is always conserved and that heat flow is a form of energy transfer.

Answer:
first law of thermodynamics