Problem: Raleigh, North Carolina:

Like much of the southeastern United States, Raleigh has a humid subtropical climate (Koppen Cfa), with four distinct seasons. Winters are short and generally cool, with a January daily average of 41.0 F (5.0 C). On average, there are 69 nights per year that drop to or below freezing, and only 2.7 days that fail to rise above freezing. April is the driest month, with an average of 2.91 inches (73.9 mm) of precipitation. Precipitation is well distributed around the year, with a slight maximum between July and September; on average, July is the wettest month, owing to generally frequent, sometimes heavy, showers and thunderstorms. Summers are hot and humid, with a daily average in July of 80.0 F (26.7 C). There are 48 days per year with highs at or above 90 F (32 C). Autumn is similar to spring overall but has fewer days of rainfall. Extremes in temperature have ranged from 9 F (23 C) on January 21, 1985 up to 105 F (41 C), most recently on July 8, 2012.

How many days go under 90 F?
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A: unanswerable

Problem: The oak forests of the southern and central Appalachians consist largely of black, northern red, white, chestnut and scarlet oaks (Quercus velutina, Q. rubra, Q. alba, Q. prinus and Q. coccinea) and hickories, such as the pignut (Carya glabra) in particular. The richest forests, which grade into mesic types, usually in coves and on gentle slopes, have dominantly white and northern red oaks, while the driest sites are dominated by chestnut oak, or sometimes by scarlet or northern red oaks. In the northern Appalachians the oaks, except for white and northern red, drop out, while the latter extends farthest north.
What are the five primary types of hickories?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Incandescent lamps are nearly pure resistive loads with a power factor of 1. This means the actual power consumed (in watts) and the apparent power (in volt-amperes) are equal. Incandescent light bulbs are usually marketed according to the electrical power consumed. This is measured in watts and depends mainly on the resistance of the filament, which in turn depends mainly on the filament's length, thickness, and material. For two bulbs of the same voltage, type, color, and clarity, the higher-powered bulb gives more light.
What type of lamp has a power factor of 2?
A: unanswerable

Context and question: In the Graeco-Roman world, practitioners of magic were known as magi (singular magus), a "foreign" title of Persian priests. Apuleius, defending himself against accusations of casting magic spells, defined the magician as "in popular tradition (more vulgari)... someone who, because of his community of speech with the immortal gods, has an incredible power of spells (vi cantaminum) for everything he wishes to." Pliny the Elder offers a thoroughly skeptical "History of magical arts" from their supposed Persian origins to Nero's vast and futile expenditure on research into magical practices in an attempt to control the gods. Philostratus takes pains to point out that the celebrated Apollonius of Tyana was definitely not a magus, "despite his special knowledge of the future, his miraculous cures, and his ability to vanish into thin air".
What was the title of Pliny's work on magic?
Answer: "History of magical arts"

Question: The 100th meridian roughly corresponds with the line that divides the Great Plains into an area that receive 20 inches (510 millimetres) or more of rainfall per year and an area that receives less than 20 in (510 mm). In this context, the High Plains, as well as Southern Alberta, south-western Saskatchewan and Eastern Montana are mainly semi hot steppe land and are generally characterised by rangeland or marginal farmland. The region (especially the High Plains) is periodically subjected to extended periods of drought; high winds in the region may then generate devastating dust storms. The eastern Great Plains near the eastern boundary falls in the humid subtropical climate zone in the southern areas, and the northern and central areas fall in the humid continental climate.
Is there an answer to this question: what do high winds in the area sometimes cause?

Answer: dust storms

QUES: Houston's economy has a broad industrial base in energy, manufacturing, aeronautics, and transportation. It is also leading in health care sectors and building oilfield equipment; only New York City is home to more Fortune 500 headquarters within its city limits. The Port of Houston ranks first in the United States in international waterborne tonnage handled and second in total cargo tonnage handled. Nicknamed the Space City, Houston is a global city, with strengths in business, international trade, entertainment, culture, media, fashion, science, sports, technology, education, medicine and research. The city has a population from various ethnic and religious backgrounds and a large and growing international community. Houston is the most diverse city in Texas and has been described as the most diverse in the United States. It is home to many cultural institutions and exhibits, which attract more than 7 million visitors a year to the Museum District. Houston has an active visual and performing arts scene in the Theater District and offers year-round resident companies in all major performing arts.

What part of Houston ranks first in the U.S. in international tonnage?
What is the answer?
ANS:
Port of Houston