Problem: Extract the answer to the question from the following context. Question: Where were less captives sold in the 1600s, Ubangi River or Arabia? Context: During the 16th and 17th centuries slave traders began to raid the region as part of the expansion of the Saharan and Nile River slave routes. Their captives were slaved and shipped to the Mediterranean coast, Europe, Arabia, the Western Hemisphere, or to the slave ports and factories along the West and North Africa or South the Ubanqui and Congo rivers. In the mid 19th century, the Bobangi people became major slave traders and sold their captives to the Americas using the Ubangi river to reach the coast. During the 18th century Bandia-Nzakara peoples established the Bangassou Kingdom along the Ubangi River.

A: Ubangi River


Problem: Extract the answer to the question from the following context. Question: People that write books attend what? Context: Since 2009, the Tucson Festival of Books has been held annually over a two-day period in March at the University of Arizona. By 2010 it had become the fourth largest book festival in the United States, with 450 authors and 80,000 attendees. In addition to readings and lectures, it features a science fair, varied entertainment, food, and exhibitors ranging from local retailers and publishers to regional and national nonprofit organizations. In 2011, the Festival began presenting a Founder's Award; recipients include Elmore Leonard and R.L. Stine.

A: Tucson Festival of Books


Problem: Extract the answer to the question from the following context. Question: Which of the following has industrial centers, Claveria or Azcapotzalco? Context: North of the Historic Center, Azcapotzalco and Gustavo A. Madero have important industrial centers and neighborhoods that range from established middle-class colonias such as Claveria and Lindavista to huge low-income housing areas that share hillsides with adjacent municipalities in the State of Mexico. In recent years much of northern Mexico City's industry has moved to nearby municipalities in the State of Mexico. Northwest of Mexico City itself is Ciudad Satélite, a vast middle to upper-middle-class residential and business area.

A: Azcapotzalco


Problem: Extract the answer to the question from the following context. Question: How did Galileo record Neptune's location? Context: Some of the earliest recorded observations ever made through a telescope, Galileo's drawings on 28 December 1612 and 27 January 1613, contain plotted points that match up with what is now known to be the position of Neptune. On both occasions, Galileo seems to have mistaken Neptune for a fixed star when it appeared close—in conjunction—to Jupiter in the night sky; hence, he is not credited with Neptune's discovery. At his first observation in December 1612, Neptune was almost stationary in the sky because it had just turned retrograde that day. This apparent backward motion is created when Earth's orbit takes it past an outer planet. Because Neptune was only beginning its yearly retrograde cycle, the motion of the planet was far too slight to be detected with Galileo's small telescope. In July 2009, University of Melbourne physicist David Jamieson announced new evidence suggesting that Galileo was at least aware that the 'star' he had observed had moved relative to the fixed stars.

A:
plotted points