Problem: Capital punishment in the United States:

The method of execution of federal prisoners for offenses under the Violent Crime Control and Law Enforcement Act of 1994 is that of the state in which the conviction took place. If the state has no death penalty, the judge must choose a state with the death penalty for carrying out the execution. For offenses under the Drug Kingpin Act of 1988, the method of execution is lethal injection. The Federal Correctional Complex in Terre Haute, Indiana is currently the home of the only death chamber for federal death penalty recipients in the United States, where inmates are put to death by lethal injection. The complex has so far been the only location used for federal executions post-Gregg. Timothy McVeigh and Juan Garza were put to death in June 2001, and Louis Jones, Jr. was put to death on March 18, 2003.

In what state is the Federal Correctional Complex in Tennessee?
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A: unanswerable

Problem: Guinea-Bissau:

The word gumbe is sometimes used generically, to refer to any music of the country, although it most specifically refers to a unique style that fuses about ten of the country's folk music traditions. Tina and tinga are other popular genres, while extent folk traditions include ceremonial music used in funerals, initiations and other rituals, as well as Balanta brosca and kussunde, Mandinga djambadon, and the kundere sound of the Bissagos Islands.

What is sometimes used as a generic word for any music of Guinea-Bissau?
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A: gumbe

Problem: Charleston, South Carolina:

The highest temperature recorded within city limits was 104 F (40 C), on June 2, 1985, and June 24, 1944, and the lowest was 7 F (14 C) on February 14, 1899, although at the airport, where official records are kept, the historical range is 105 F (41 C) on August 1, 1999 down to 6 F (14 C) on January 21, 1985. Hurricanes are a major threat to the area during the summer and early fall, with several severe hurricanes hitting the area most notably Hurricane Hugo on September 21, 1989 (a category 4 storm). Dewpoint in the summer ranges from 67.8 to 71.4 F (20 to 22 C).

What hurricane hit Charleston in 1998?
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A: unanswerable

Problem: Sahara:

The effects of local surface low pressure are extremely limited because upper-level subsidence still continues to block any form of air ascent. Also, to be protected against rain-bearing weather systems by the atmospheric circulation itself, the desert is made even drier by his geographical configuration and location. Indeed, the extreme aridity of the Sahara can't be only explained by the subtropical high pressure. The Atlas Mountains, found in Algeria, Morocco and Tunisia also help to enhance the aridity of the northern part of the desert. These major mountain ranges act as a barrier causing a strong rain shadow effect on the leeward side by dropping much of the humidity brought by atmospheric disturbances along the polar front which affects the surrounding Mediterranean climates.

What mountains reduce some of the aridity?
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A:
unanswerable