input question: Question: "Why would a light be shaded?" Context: "An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the fixture per used energy, usually measured in lumen per watt. A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the surroundings. The more transparent the lighting fixture is, the higher efficacy. Shading the light will normally decrease efficacy but increase the directionality and the visual comfort probability." Answer:???
output answer: increase the directionality and the visual comfort probability

Question: "How many people where born in the same canton?" Context: "As of 2008[update], the population was 47.5% male and 52.5% female. The population was made up of 44,032 Swiss men (35.4% of the population) and 15,092 (12.1%) non-Swiss men. There were 51,531 Swiss women (41.4%) and 13,726 (11.0%) non-Swiss women. Of the population in the municipality, 39,008 or about 30.3% were born in Bern and lived there in 2000. There were 27,573 or 21.4% who were born in the same canton, while 25,818 or 20.1% were born somewhere else in Switzerland, and 27,812 or 21.6% were born outside of Switzerland." Answer:
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Answer: 27,573

Q: Question: "What is different about individuals versus groups?" Context: "The technical rules for the Japanese version of men's rhythmic gymnastics came around the 1970s. For individuals, only four types of apparatus are used: the double rings, the stick, the rope, and the clubs. Groups do not use any apparatus. The Japanese version includes tumbling performed on a spring floor. Points are awarded based a 10-point scale that measures the level of difficulty of the tumbling and apparatus handling. On November 2729, 2003, Japan hosted first edition of the Men's Rhythmic Gymnastics World Championship." Answer:
A: For individuals, only four types of apparatus are used

Question: Question: "What used to be the main goal?" Context: "In 1955 American nuclear arms policy became one aimed primarily at arms control as opposed to disarmament. The failure of negotiations over arms until 1955 was due mainly to the refusal of the Russians to permit any sort of inspections. In talks located in London that year, they expressed a willingness to discuss inspections; the tables were then turned on Eisenhower, when he responded with an unwillingness on the part of the U.S. to permit inspections. In May of that year the Russians agreed to sign a treaty giving independence to Austria, and paved the way for a Geneva summit with the U.S., U.K. and France. At the Geneva Conference Eisenhower presented a proposal called "Open Skies" to facilitate disarmament, which included plans for Russia and the U.S. to provide mutual access to each other's skies for open surveillance of military infrastructure. Russian leader Nikita Khrushchev dismissed the proposal out of hand." Answer:
Answer: disarmament

[Q]: Question: "What was Gabu?" Context: "Guinea-Bissau was once part of the kingdom of Gabu, part of the Mali Empire; parts of this kingdom persisted until the 18th century. Other parts of the territory in the current country were considered by the Portuguese as part of their empire. Portuguese Guinea was known as the Slave Coast, as it was a major area for the exportation of African slaves by Europeans to the western hemisphere. Previously slaves had been traded by Arabs north to the northern part of Africa and into the Middle East." Answer:
****
[A]: kingdom

Problem: Given the question: Question: "Regarding the place with insignificant tree cover, the types of that place are?" Context: "Everything in between the far south and the far north is savannah (insignificant tree cover, with grasses and flowers located between trees). Rainfall is more limited, to between 500 and 1,500 millimetres (20 and 60 in) per year. The savannah zone's three categories are Guinean forest-savanna mosaic, Sudan savannah, and Sahel savannah. Guinean forest-savanna mosaic is plains of tall grass interrupted by trees. Sudan savannah is similar but with shorter grasses and shorter trees. Sahel savannah consists of patches of grass and sand, found in the northeast. In the Sahel region, rain is less than 500 millimetres (20 in) per year and the Sahara Desert is encroaching. In the dry north-east corner of the country lies Lake Chad, which Nigeria shares with Niger, Chad and Cameroon." Answer:
++++++++++++++++++++++++++++++++
The answer is:
Guinean forest-savanna mosaic, Sudan savannah, and Sahel savannah