Problem: Hyderabad:

Hyderabad (i/hadrbd/ HY-dr--bad; often /hadrbd/) is the capital of the southern Indian state of Telangana and de jure capital of Andhra Pradesh.[A] Occupying 650 square kilometres (250 sq mi) along the banks of the Musi River, it has a population of about 6.7 million and a metropolitan population of about 7.75 million, making it the fourth most populous city and sixth most populous urban agglomeration in India. At an average altitude of 542 metres (1,778 ft), much of Hyderabad is situated on hilly terrain around artificial lakes, including Hussain Sagarpredating the city's foundingnorth of the city centre.

What river is Hyderabad next to?
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A: the Musi River

Problem: Greece:

Greece has one of the longest histories of any country, and is considered the cradle of Western civilization, and as such, is the birthplace of democracy, Western philosophy, the Olympic Games, Western literature, historiography, political science, major scientific and mathematical principles, and Western drama, including both tragedy and comedy. Greece was first unified under Philip of Macedon in the fourth century BC. His son Alexander the Great rapidly conquered much of the ancient world, spreading Greek culture and science from the eastern Mediterranean to the Indus River. Annexed by Rome in the second century BC, Greece became an integral part of the Roman Empire and its successor, the Byzantine Empire. The first century AD saw the establishment of the Greek Orthodox Church, which shaped the modern Greek identity and transmitted Greek traditions to the wider Orthodox World. Falling under Ottoman dominion in the mid-15th century, the modern nation state of Greece emerged in 1830 following the war of independence. Greece's rich historical legacy is reflected in large part by its 17 UNESCO World Heritage Sites, among the most in Europe and the world.

Who was the first person to bring all of Greece together?
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A: Philip of Macedon

Problem: Charleston, South Carolina:

Charleston is the oldest and second-largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the CharlestonNorth CharlestonSummerville Metropolitan Statistical Area. The city lies just south of the geographical midpoint of South Carolina's coastline and is located on Charleston Harbor, an inlet of the Atlantic Ocean formed by the confluence of the Ashley and Cooper Rivers, or, as is locally expressed, "where the Cooper and Ashley Rivers come together to form the Atlantic Ocean."

What is the oldest city in South Carolina?
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A: Charleston

Problem: Glass:

Color in glass may be obtained by addition of electrically charged ions (or color centers) that are homogeneously distributed, and by precipitation of finely dispersed particles (such as in photochromic glasses). Ordinary soda-lime glass appears colorless to the naked eye when it is thin, although iron(II) oxide (FeO) impurities of up to 0.1 wt% produce a green tint, which can be viewed in thick pieces or with the aid of scientific instruments. Further FeO and Cr2O3 additions may be used for the production of green bottles. Sulfur, together with carbon and iron salts, is used to form iron polysulfides and produce amber glass ranging from yellowish to almost black. A glass melt can also acquire an amber color from a reducing combustion atmosphere. Manganese dioxide can be added in small amounts to remove the green tint given by iron(II) oxide. When used in art glass or studio glass is colored using closely guarded recipes that involve specific combinations of metal oxides, melting temperatures and 'cook' times. Most colored glass used in the art market is manufactured in volume by vendors who serve this market although there are some glassmakers with the ability to make their own color from raw materials.

What other additives can give glass a sulfur tint?
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A:
unanswerable