Problem: Paper:

The thickness of paper is often measured by caliper, which is typically given in thousandths of an inch in the United States and in thousandths of a mm in the rest of the world. Paper may be between 0.07 and 0.18 millimetres (0.0028 and 0.0071 in) thick.

What is often given in hundredths of an mm?
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A: unanswerable


Problem: North Carolina:

The climate of the coastal plain is influenced by the Atlantic Ocean, which keeps conditions mild in winter and moderate, although humid, in summer. The highest coastal, daytime temperature averages less than 89 °F (32 °C) during summer months. The coast has mild temperatures in winter, with daytime highs rarely below 40 °F (4 °C). The average daytime temperature in the coastal plain is usually in the mid-50s °F (11–14 °C) in winter. Temperatures in the coastal plain only occasionally drop below the freezing point at night. The coastal plain averages only around 1 inch (2.5 cm) of snow or ice annually, and in many years, there may be no snow or ice at all.

What is the climate of North Carolinas coastal plain in the summer?
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A: moderate, although humid


Problem: Black people:

The concept of blackness in the United States has been described as the degree to which one associates themselves with mainstream African-American culture, politics, and values. To a certain extent, this concept is not so much about race but more about political orientation, culture and behavior. Blackness can be contrasted with "acting white", where black Americans are said to behave with assumed characteristics of stereotypical white Americans with regard to fashion, dialect, taste in music, and possibly, from the perspective of a significant number of black youth, academic achievement.

What defines "blackness"?
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A: political orientation, culture and behavior


Problem: Utrecht:

Utrecht Centraal is the main railway station of Utrecht. There are regular intercity services to all major Dutch cities; direct services to Schiphol Airport. Utrecht Centraal is a station on the night service, providing 7 days a week an all night service to (among others) Schiphol Airport, Amsterdam and Rotterdam. International InterCityExpress (ICE) services to Germany (and further) through Arnhem call at Utrecht Centraal. Regular local trains to all areas surrounding Utrecht also depart from Utrecht Centraal; and service several smaller stations: Utrecht Lunetten, Utrecht Vaartsche Rijn, Utrecht Overvecht, Utrecht Leidsche Rijn, Utrecht Terwijde, Utrecht Zuilen and Vleuten. A former station Utrecht Maliebaan closed in 1939 and has since been converted into the Dutch Railway Museum.

where to regular local trains provide service 
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A:
local trains to all areas surrounding Utrecht also depart from Utrecht Centraal; and service several smaller stations