Problem: Charleston, South Carolina:

Africans were brought to Charles Town on the Middle Passage, first as "servants", then as slaves. Ethnic groups transported here included especially Wolof, Yoruba, Fulani, Igbo, Malinke, and other people of the Windward Coast. An estimated 40% of the total 400,000 Africans transported and sold as slaves into North America are estimated to have landed at Sullivan's Island, just off the port of Charles Town; it is described as a "hellish Ellis Island of sorts .... Today nothing commemorates that ugly fact but a simple bench, established by the author Toni Morrison using private funds."

What peoples weren't brought to Charles Town to be slaves?
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A: unanswerable

Problem: Utrecht:

Although there is some evidence of earlier inhabitation in the region of Utrecht, dating back to the Stone Age (app. 2200 BCE) and settling in the Bronze Age (app. 1800800 BCE), the founding date of the city is usually related to the construction of a Roman fortification (castellum), probably built in around 50 CE. A series of such fortresses was built after the Roman emperor Claudius decided the empire should not expand north. To consolidate the border the limes Germanicus defense line was constructed along the main branch of the river Rhine, which at that time flowed through a more northern bed compared to today (what is now the Kromme Rijn). These fortresses were designed to house a cohort of about 500 Roman soldiers. Near the fort settlements would grow housing artisans, traders and soldiers' wives and children.

What did the Roman emperor Claudius decide
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A: Claudius decided the empire should not expand north.

Problem: Circadian rhythm:

Due to the work nature of airline pilots, who often cross several timezones and regions of sunlight and darkness in one day, and spend many hours awake both day and night, they are often unable to maintain sleep patterns that correspond to the natural human circadian rhythm; this situation can easily lead to fatigue. The NTSB cites this as contributing to many accidents[unreliable medical source?] and has conducted several research studies in order to find methods of combating fatigue in pilots.

What organizations cites this disruption of sleep patterns as a cause of accidents?
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A: NTSB

Problem: Political philosophy:

Islamic political philosophy, was, indeed, rooted in the very sources of Islami.e., the Qur'an and the Sunnah, the words and practices of Muhammadthus making it essentially theocratic. However, in the Western thought, it is generally supposed that it was a specific area peculiar merely to the great philosophers of Islam: al-Kindi (Alkindus), al-Farabi (Abunaser), Ibn Sina (Avicenna), Ibn Bajjah (Avempace), Ibn Rushd (Averroes), and Ibn Khaldun. The political conceptions of Islam such as kudrah (power), sultan, ummah, cemaa (obligation)-and even the "core" terms of the Qur'ani.e., ibadah (worship), din (religion), rab (master) and ilah (deity)is taken as the basis of an analysis. Hence, not only the ideas of the Muslim political philosophers but also many other jurists and ulama posed political ideas and theories. For example, the ideas of the Khawarij in the very early years of Islamic history on Khilafa and Ummah, or that of Shia Islam on the concept of Imamah are considered proofs of political thought. The clashes between the Ehl-i Sunna and Shia in the 7th and 8th centuries had a genuine political character.

What do the ideas of general political character give proof of in early Islamic history?
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A:
unanswerable