In architecture Durer cites Vitruvius but elaborates his own classical designs and columns. In typography, Durer depicts the geometric construction of the Latin alphabet, relying on Italian precedent. However, his construction of the Gothic alphabet is based upon an entirely different modular system. The fourth book completes the progression of the first and second by moving to three-dimensional forms and the construction of polyhedra. Here Durer discusses the five Platonic solids, as well as seven Archimedean semi-regular solids, as well as several of his own invention. In all these, Durer shows the objects as nets. Finally, Durer discusses the Delian Problem and moves on to the 'construzione legittima', a method of depicting a cube in two dimensions through linear perspective. It was in Bologna that Durer was taught (possibly by Luca Pacioli or Bramante) the principles of linear perspective, and evidently became familiar with the 'costruzione legittima' in a written description of these principles found only, at this time, in the unpublished treatise of Piero della Francesca. He was also familiar with the 'abbreviated construction' as described by Alberti and the geometrical construction of shadows, a technique of Leonardo da Vinci. Although Durer made no innovations in these areas, he is notable as the first Northern European to treat matters of visual representation in a scientific way, and with understanding of Euclidean principles. In addition to these geometrical constructions, Durer discusses in this last book of Underweysung der Messung an assortment of mechanisms for drawing in perspective from models and provides woodcut illustrations of these methods that are often reproduced in discussions of perspective.
What question would one ask from this paragraph?

QUESTION: What kind of solids does Durer discuss in his fourth book?

Nathan read the package of words in silence, his only motions the steady progress of his eyes and occasional replacement of pages. Allan sat nervously across from him in a chair Nathan had probably upholstered himself, a patchwork design of fabric containing easily more stuffing than any other furniture item of the period. At long last, Nathan reached the end and set down his reading on the table between them. Allan leaned forward unconsciously. "It's the best story you've ever written." Allan exhaled and leaned back into the chair, his face relaxing in imitation of his thoughts. "So," he asked, "you don't think it's a waste of ink and paper, a futile expedition into morbidity or literary debauchery?" "Heavens, no," said Nathan, aghast. "This is one of the strongest works I've read in ages. It speaks to the deepest storyteller's instinct within us all, yet is entirely original. My dear friend, you have done it. Oh, they may rail against you at first; they may decry you as a heathen or a literary savage; but while those in power say such things, others will read your tales and see their true worth. Believe me when I say that you will be read a century from now." Allan, though dubious as to that possibility, felt some temptation from the compliment; mainly, it granted him the encouragement he still needed. Nathan promised to show the story to a printer he knew and Allan left it with him, then walked home under the spreading maples with a smile lingering on his face. He felt now that perhaps Nathan was right; although the man was somewhat peculiar, he had both an unimpeachable honesty and a certain propensity for insight. Certainly, it was undeniable that the stories had an originality to them. His mind's strangest fruit had ripened at last, and he found the taste less bitter than expected. These thoughts and others like them filled his head as he walked the long road home. It was evening, and the sky burned orange in the west when he neared home at last.
What question would one ask from this paragraph?

QUESTION: Why was Allan nervous?

Early in chapter 5 we introduced, along with Khalid Sheikh Mohammed, two other men who became operational coordinators for al Qaeda: Khallad and Nashiri. As we explained, both were involved during 1998 and 1999 in preparing to attack a ship off the coast of Yemen with a boatload of explosives. They had originally targeted a commercial vessel, specifically an oil tanker, but Bin Laden urged them to look for a U.S.warship instead. In January 2000, their team had attempted to attack a warship in the port of Aden, but the attempt failed when the suicide boat sank. More than nine months later, on October 12,2000, al Qaeda operatives in a small boat laden with explosives attacked a U.S. Navy destroyer, the USS Cole. The blast ripped a hole in the side of the Cole, killing 17 members of the ship's crew and wounding at least 40. The plot, we now know, was a full-fledged al Qaeda operation, supervised directly by Bin Laden. He chose the target and location of the attack, selected the suicide operatives, and provided the money needed to purchase explosives and equipment. Nashiri was the field commander and managed the operation in Yemen. Khallad helped in Yemen until he was arrested in a case of mistaken identity and freed with Bin Laden's help, as we also mentioned earlier. Local al Qaeda coordinators included Jamal al Badawi and Fahd al Quso, who was supposed to film the attack from a nearby apartment. The two suicide operatives chosen were Hassan al Khamri and Ibrahim al Thawar, also known as Nibras. Nibras and Quso delivered money to Khallad in Bangkok during Khallad's January 2000 trip to Kuala Lumpur and Bangkok. In September 2000, Bin Laden reportedly told Nashiri that he wanted to replace Khamri and Nibras. Nashiri was angry and disagreed, telling others he would go to Afghanistan and explain to Bin Laden that the new operatives were already trained and ready to conduct the attack. Prior to departing, Nashiri gave Nibras and Khamri instructions to execute the attack on the next U.S.warship that entered the port of Aden.
What question would one ask from this paragraph?

QUESTION:
Who were the two men, along with Khalid Sheikh Mohammed, that were preparing to attack a ship in 1998 and 1999?