In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

[Q]: According to the radar reconstruction, American 77 reemerged as a primary target on Indianapolis Center radar scopes at 9:05, east of its last known position. The target remained in Indianapolis Center's airspace for another six minutes, then crossed into the western portion of Washington Center's airspace at 9:10. As Indianapolis Center continued searching for the aircraft, two managers and the controller responsible for American 77 looked to the west and southwest along the flight's projected path, not east-where the aircraft was now heading. Managers did not instruct other controllers at Indianapolis Center to turn on their primary radar coverage to join in the search for American 77. In sum, Indianapolis Center never saw Flight 77 turn around. By the time it reappeared in primary radar coverage, controllers had either stopped looking for the aircraft because they thought it had crashed or were looking toward the west. Although the Command Center learned Flight 77 was missing, neither it nor FAA headquarters issued an all points bulletin to surrounding centers to search for primary radar targets. American 77 traveled undetected for 36 minutes on a course heading due east for Washington, D.C. By 9:25, FAA's Herndon Command Center and FAA headquarters knew two aircraft had crashed into the World Trade Center. They knew American 77 was lost. At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said "we have some planes." Concerns over the safety of other aircraft began to mount. A manager at the Herndon Command Center asked FAA headquarters if they wanted to order a "nationwide ground stop." While this was being discussed by executives at FAA headquarters, the Command Center ordered one at 9:25. The Command Center kept looking for American 77. At 9:21, it advised the Dulles terminal control facility, and Dulles urged its controllers to look for primary targets. At 9:32, they found one. Several of the Dulles controllers "observed a primary radar target tracking eastbound at a high rate of speed" and notified Reagan National Airport. FAA personnel at both Reagan National and Dulles airports notified the Secret Service. <sep>What was ordered at the Command Center at 9:25?<sep>Grounding
[A]: Yes

[Q]: Representing yourself in court can be a tricky endeavor. There are confusing legal terms to learn, strict procedures to follow and volumes of case law that often need to be understood to prepare a case. Lake County officials and a private agency that assists indigent litigants in Illinois want to make the practice easier by creating a self-help center for people who choose to represent themselves in legal matters. The center, which will be housed in the law library at the main courthouse in Waukegan, could open later this summer. "I think it's going to be extremely helpful," Court Administrator Bob Zastany said. "There is a population out there that will take advantage of this resource." The self-help center will be the only one of its kind in the county. Only a few operate nationwide, officials said. The project is the work of Lake County circuit court officials and Prairie State Legal Services, a statewide agency with an office in Waukegan that provides information and legal assistance to poor and elderly Illinois residents. The organization has received a $25,000 grant from the Illinois Equal Justice Foundation, a nonprofit group that funds programs designed to increase access to legal information and assistance, to help pay for the effort. Prairie State will share the money with the county. The county's law library is on the first floor of the governmental center at 18 N. County St. The new self-help center will be designed to help litigants find the information they need to properly represent themselves in court, an undertaking that can be complicated and confusing. "Some people can do OK on their own, and some people can do OK with some help," said Linda Rothnagel, the managing attorney for Prairie State Legal Services. "But other people can't do it. It's not always easy." Self-representation is a right affirmed by the U.S. Supreme Court. The practice is far more common in civil matters than in criminal cases. In fact, self-represented litigants - formally called "pro se" in Latin, or "for oneself" - in criminal defenses are so rare that statistics about the practice generally are not kept, legal experts say. <sep>What does Court Administrator Bob Zastany think is going to be extremely helpful?<sep>The presence of the self-help center
[A]: Yes

[Q]: 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. <sep>What kind of solids does Durer discuss in his fourth book?<sep>Platonic and seven Archimedean semi-regular solids
[A]:
Yes