Article: Burdened with debt, in 2004 Vivendi Universal sold 80% of Vivendi Universal Entertainment (including the studio and theme parks) to General Electric, parent of NBC. The resulting media super-conglomerate was renamed NBCUniversal, while Universal Studios Inc. remained the name of the production subsidiary. After that deal, GE owned 80% of NBC Universal; Vivendi held the remaining 20%, with an option to sell its share in 2006. GE purchased Vivendi's share in NBCU in 2011 and in turn sold 51% of the company to cable provider Comcast. Comcast merged the former GE subsidiary with its own cable-television programming assets, creating the current NBCUniversal. Following Federal Communications Commission (FCC) approval, the Comcast-GE deal was closed on Jan 29, 2011. In March 2013, Comcast bought the remaining 49% of NBCUniversal for $16.7 billion.

Question: In what month and year did Comcast buy 49% of NBCUniversal?
Ans: March 2013

Article: In 1999, ILO helped lead the Worst Forms Convention 182 (C182), which has so far been signed upon and domestically ratified by 151 countries including the United States. This international law prohibits worst forms of child labour, defined as all forms of slavery and slavery-like practices, such as child trafficking, debt bondage, and forced labour, including forced recruitment of children into armed conflict. The law also prohibits the use of a child for prostitution or the production of pornography, child labour in illicit activities such as drug production and trafficking; and in hazardous work. Both the Worst Forms Convention (C182) and the Minimum Age Convention (C138) are examples of international labour standards implemented through the ILO that deal with child labour.

Question: What other international laws deal with child labour?
Ans: Minimum Age Convention (C138)

Article: Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate collectors (34%) generally used for domestic hot water; and unglazed plastic collectors (21%) used mainly to heat swimming pools.

Question: What do Solar hot water systems use to heat water?
Ans: sunlight

Article: Meanwhile, Le Verrier by letter urged Berlin Observatory astronomer Johann Gottfried Galle to search with the observatory's refractor. Heinrich d'Arrest, a student at the observatory, suggested to Galle that they could compare a recently drawn chart of the sky in the region of Le Verrier's predicted location with the current sky to seek the displacement characteristic of a planet, as opposed to a fixed star. On the evening of 23 September 1846, the day Galle received the letter, he discovered Neptune within 1 of where Le Verrier had predicted it to be, about 12 from Adams' prediction. Challis later realised that he had observed the planet twice, on 4 and 12 August, but did not recognise it as a planet because he lacked an up-to-date star map and was distracted by his concurrent work on comet observations.

Question: What was Challis looking for when he saw Neptune the first two times?
Ans:
comet observations