Article: The political turmoil continued. John began to explore an alliance with the French king Philip II, freshly returned from the crusade. John hoped to acquire Normandy, Anjou and the other lands in France held by Richard in exchange for allying himself with Philip. John was persuaded not to pursue an alliance by his mother. Longchamp, who had left England after Walter's intervention, now returned, and argued that he had been wrongly removed as justiciar. John intervened, suppressing Longchamp's claims in return for promises of support from the royal administration, including a reaffirmation of his position as heir to the throne. When Richard still did not return from the crusade, John began to assert that his brother was dead or otherwise permanently lost. Richard had in fact been captured en route to England by the Duke of Austria and was handed over to Emperor Henry VI, who held him for ransom. John seized the opportunity and went to Paris, where he formed an alliance with Philip. He agreed to set aside his wife, Isabella of Gloucester, and marry Philip's sister, Alys, in exchange for Philip's support. Fighting broke out in England between forces loyal to Richard and those being gathered by John. John's military position was weak and he agreed to a truce; in early 1194 the king finally returned to England, and John's remaining forces surrendered. John retreated to Normandy, where Richard finally found him later that year. Richard declared that his younger brother despite being 27 years old was merely "a child who has had evil counsellors" and forgave him, but removed his lands with the exception of Ireland.

Question: When did the king return to England?
Ans: 1194

Article: In 1991, US President George H. W. Bush awarded Hayek the Presidential Medal of Freedom, one of the two highest civilian awards in the United States, for a "lifetime of looking beyond the horizon". Hayek died on 23 March 1992 in Freiburg, Germany, and was buried on 4 April in the Neustift am Walde cemetery in the northern outskirts of Vienna according to the Catholic rite. In 2011, his article The Use of Knowledge in Society was selected as one of the top 20 articles published in the American Economic Review during its first 100 years.

Question: Where was Hayek when he died?
Ans: Freiburg, Germany

Article: Multi-layer printed circuit boards have trace layers inside the board. This is achieved by laminating a stack of materials in a press by applying pressure and heat for a period of time. This results in an inseparable one piece product. For example, a four-layer PCB can be fabricated by starting from a two-sided copper-clad laminate, etch the circuitry on both sides, then laminate to the top and bottom pre-preg and copper foil. It is then drilled, plated, and etched again to get traces on top and bottom layers.

Question: Pressure is one thing you need to apply to make a multi-layer PCB; what's the other thing?
Ans: heat

Article: One of the most spectacular examples of obligate mutualism is between the siboglinid tube worms and symbiotic bacteria that live at hydrothermal vents and cold seeps. The worm has no digestive tract and is wholly reliant on its internal symbionts for nutrition. The bacteria oxidize either hydrogen sulfide or methane, which the host supplies to them. These worms were discovered in the late 1980s at the hydrothermal vents near the Galapagos Islands and have since been found at deep-sea hydrothermal vents and cold seeps in all of the world's oceans.

Question: What does the bacteria give the worm?
Ans:
nutrition