Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Input: Consider Input: Paragraph- Sent 1: Maximilian's death came at a time when Durer was concerned he was losing "my sight and freedom of hand" (perhaps caused by arthritis) and increasingly affected by the writings of Martin Luther.
Sent 2: In July 1520 Durer made his fourth and last major journey, to renew the Imperial pension Maximilian had given him and to secure the patronage of the new emperor, Charles V, who was to be crowned at Aachen.
Sent 3: Durer journeyed with his wife and her maid via the Rhine to Cologne and then to Antwerp, where he was well received and produced numerous drawings in silverpoint, chalk and charcoal.
Sent 4: In addition to going to the coronation, he made excursions to Cologne (where he admired the painting of Stefan Lochner), Nijmegen, 's-Hertogenbosch, Bruges (where he saw Michelangelo's Madonna of Bruges), Ghent (where he admired van Eyck's altarpiece), and Zeeland.
Sent 5: Durer took a large stock of prints with him and wrote in his diary to whom he gave, exchanged or sold them, and for how much.
Sent 6: This provides rare information of the monetary value placed on prints at this time.
Sent 7: Unlike paintings, their sale was very rarely documented.
Sent 8: While providing valuable documentary evidence, Durer's Netherlandish diary also reveals that the trip was not a profitable one.
Sent 9: For example, Durer offered his last portrait of Maximilian to his daughter, Margaret of Austria, but eventually traded the picture for some white cloth after Margaret disliked the portrait and declined to accept it.
Sent 10: During this trip he also met Bernard van Orley, Jan Provoost, Gerard Horenbout, Jean Mone, Joachim Patinir and Tommaso Vincidor, though he did not, it seems, meet Quentin Matsys.
Sent 11: At the request of Christian II of Denmark, Durer went to Brussels to paint the King's portrait.
Sent 12: There he saw "The things which have been sent to the king from the golden land"--the Aztec treasure that Hernan Cortes had sent home to Holy Roman Emperor Charles V following the fall of Mexico.
Sent 13: Durer wrote that this treasure "was much more beautiful to me than miracles.
Sent 14: These things are so precious that they have been valued at 100,000 florins".
Sent 15: Durer also appears to have been collecting for his own cabinet of curiosities, and he sent back to Nuremberg various animal horns, a piece of coral, some large fish fins, and a wooden weapon from the East Indies.
Sent 16: Having secured his pension, Durer finally returned home in July 1521, having caught an undetermined illness--perhaps malaria --which afflicted him for the rest of his life, and greatly reduced his rate of work.
Question: Why was it important that Durer wrote about the price of prints in his diary?.

Output: Because it provides rare information of the monetary value placed on prints at this time and at the time, it was very rare for the sales to be documented.

Input: Consider Input: Paragraph- Sent 1: During this time, Alexander adopted some elements of Persian dress and customs at his court, notably the custom of proskynesis, either a symbolic kissing of the hand, or prostration on the ground, that Persians showed to their social superiors.
Sent 2: The Greeks regarded the gesture as the province of deities and believed that Alexander meant to deify himself by requiring it.
Sent 3: This cost him the sympathies of many of his countrymen, and he eventually abandoned it.
Sent 4: A plot against his life was revealed, and one of his officers, Philotas, was executed for failing to alert Alexander.
Sent 5: The death of the son necessitated the death of the father, and thus Parmenion, who had been charged with guarding the treasury at Ecbatana, was assassinated at Alexander's command, to prevent attempts at vengeance.
Sent 6: Most infamously, Alexander personally killed the man who had saved his life at Granicus, Cleitus the Black, during a violent drunken altercation at Maracanda (modern day Samarkand in Uzbekistan), in which Cleitus accused Alexander of several judgemental mistakes and most especially, of having forgotten the Macedonian ways in favour of a corrupt oriental lifestyle.
Sent 7: Later, in the Central Asian campaign, a second plot against his life was revealed, this one instigated by his own royal pages.
Sent 8: His official historian, Callisthenes of Olynthus, was implicated in the plot; however, historians have yet to reach a consensus regarding this involvement.
Sent 9: Callisthenes had fallen out of favor by leading the opposition to the attempt to introduce proskynesis.
Question: Why did Parmenion have to die?.

Output: The death of the son necessitated the death of the father.

Input: Consider Input: Paragraph- Sent 1: Renewable Energy Resource Sunlight Sunlight can be used to heat homes.
Sent 2: It can also be used to produce electricity.
Sent 3: This conversion is made possible by solar cells.
Sent 4: However, solar energy may not always be practical.
Sent 5: Some areas are just too cloudy.
Sent 6: Example Solar panels on the roof of this house generate enough electricity to supply a familys needs.
Sent 7: Moving Water Falling water can have a lot of energy.
Sent 8: Its energy can be converted into kinetic energy.
Sent 9: This energy can turn a turbine and generate electricity.
Sent 10: The water may fall naturally over a waterfall or flow through a dam.
Sent 11: A drawback of dams is that they flood land upstream.
Sent 12: They can also reduce water flow downstream.
Sent 13: Either effect may harm ecosystems.
Sent 14: Wind Wind is moving air.
Sent 15: It has kinetic energy that can do work.
Sent 16: Wind turbines change the kinetic energy of the wind to electrical energy.
Sent 17: Only certain areas of the world get enough steady wind.
Sent 18: Many people also think that wind turbines are noisy and not very nice to look at.
Question: What can these forms of energy be used to produce?.
Output: Both electricity and heat can be produced.