Input: Read this: In the far north, there is a division between Berber-descendent Tuareg nomad populations and the darker-skinned Bella or Tamasheq people, due the historical spread of slavery in the region. An estimated 800,000 people in Mali are descended from slaves. Slavery in Mali has persisted for centuries. The Arabic population kept slaves well into the 20th century, until slavery was suppressed by French authorities around the mid-20th century. There still persist certain hereditary servitude relationships, and according to some estimates, even today approximately 200,000 Malians are still enslaved.
Question: What group of people were known to keep Malian salves into the 20th century?

Output: Arabic population

Input: Read this: Jehovah's Witnesses believe that Jesus is God's only direct creation, that everything else was created by means of Christ, and that the initial unassisted act of creation uniquely identifies Jesus as God's "only-begotten Son". Jesus served as a redeemer and a ransom sacrifice to pay for the sins of humanity. They believe Jesus died on a single upright post rather than the traditional cross. They believe that references in the Bible to the Archangel Michael, Abaddon (Apollyon), and the Word all refer to Jesus. Jesus is considered to be the only intercessor and high priest between God and humanity, and appointed by God as the king and judge of his kingdom. His role as a mediator (referred to in 1 Timothy 2:5) is applied to the 'anointed' class, though the 'other sheep' are said to also benefit from the arrangement.
Question: Jesus is considered to be the only what between God and humanity?

Output: intercessor and high priest

Input: Read this: The use of the term Lander (Lands) dates back to the Weimar Constitution of 1919. Before this time, the constituent states of the German Empire were called Staaten (States). Today, it is very common to use the term Bundesland (Federal Land). However, this term is not used officially, neither by the constitution of 1919 nor by the Basic Law (Constitution) of 1949. Three Lander call themselves Freistaaten (Free States, which is the old-fashioned German expression for Republic), Bavaria (since 1919), Saxony (originally since 1919 and again since 1990), and Thuringia (since 1994). There is little continuity between the current states and their predecessors of the Weimar Republic with the exception of the three free states, and the two city-states of Hamburg and Bremen.
Question: What is the only state that is considered a city-state in Germany?

Output: unanswerable

Input: Read this: On an international level the German DIN 4512 system has been effectively superseded in the 1980s by ISO 6:1974, ISO 2240:1982, and ISO 5800:1979 where the same sensitivity is written in linear and logarithmic form as "ISO 100/21" (now again with degree symbol). These ISO standards were subsequently adopted by DIN as well. Finally, the latest DIN 4512 revisions were replaced by corresponding ISO standards, DIN 4512-1:1993-05 by DIN ISO 6:1996-02 in September 2000, DIN 4512-4:1985-08 by DIN ISO 2240:1998-06 and DIN 4512-5:1990-11 by DIN ISO 5800:1998-06 both in July 2002.
Question: How is sensitivity shown in the ISO systems?

Output:
in linear and logarithmic form as "ISO 100/21"