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.

Ex 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?.

Ex 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.


Ex Input:
Paragraph- Sent 1: You might want to know how cold it is.
Sent 2: You may need to know how fast the wind is blowing.
Sent 3: Maybe it rained last night?
Sent 4: Do you know how much?
Sent 5: Does it feel humid to you?
Sent 6: You have heard all these questions before.
Sent 7: To answer these questions, we need data.
Sent 8: That data comes from special tools.
Sent 9: These tools collect data about the weather.
Sent 10: You can see some of the common tools listed below: A thermometer measures temperature.
Sent 11: An anemometer measures wind speed.
Sent 12: A rain gauge measures the amount of rain.
Sent 13: A hygrometer measures humidity.
Sent 14: A wind vane shows wind direction.
Sent 15: A snow gauge measures the amount of snow. 
Question: How is weather measured?.

Ex Output:
Special tools.


Ex Input:
Paragraph- Sent 1: The day was just breaking, as I left the tower; though it was still too dark in the house to be able to see without a light, and I took one of the study candles with me on my 'round.
Sent 2: By the time I had finished the ground floor, the daylight was creeping in, wanly, through the barred windows.
Sent 3: My search had shown me nothing fresh.
Sent 4: Everything appeared to be in order, and I was on the point of extinguishing my candle, when the thought suggested itself to me to have another glance 'round the cellars.
Sent 5: I had not, if I remember rightly, been into them since my hasty search on the evening of the attack.
Sent 6: For, perhaps, the half of a minute, I hesitated.
Sent 7: I would have been very willing to forego the task--as, indeed, I am inclined to think any man well might--for of all the great, awe-inspiring rooms in this house, the cellars are the hugest and weirdest.
Sent 8: Great, gloomy caverns of places, unlit by any ray of daylight.
Sent 9: Yet, I would not shirk the work.
Sent 10: I felt that to do so would smack of sheer cowardice.
Sent 11: Besides, as I reassured myself, the cellars were really the most unlikely places in which to come across anything dangerous; considering that they can be entered, only through a heavy oaken door, the key of which, I carry always on my person. 
Question: Where had he not been since the night of the evening of the attack?.

Ex Output:

The cellars.


