Problem: Please answer a question about the following article about Sahara:
The Byzantine Empire ruled the northern shores of the Sahara from the 5th to the 7th centuries. After the Muslim conquest of Arabia (Arabian peninsula) the Muslim conquest of North Africa began in the mid-7th to early 8th centuries, Islamic influence expanded rapidly on the Sahara. By the end of 641 all of Egypt was in Muslim hands. The trade across the desert intensified. A significant slave trade crossed the desert. It has been estimated that from the 10th to 19th centuries some 6,000 to 7,000 slaves were transported north each year.
What group of people ruled the northern shoes of the Sahara?
A: Byzantine Empire

Question: Read this and answer the question

To prevent the risk of out-of-phase supplies mixing, sections of line fed from different feeder stations must be kept strictly isolated. This is achieved by Neutral Sections (also known as Phase Breaks), usually provided at feeder stations and midway between them although, typically, only half are in use at any time, the others being provided to allow a feeder station to be shut down and power provided from adjacent feeder stations. Neutral Sections usually consist of an earthed section of wire which is separated from the live wires on either side by insulating material, typically ceramic beads, designed so that the pantograph will smoothly run from one section to the other. The earthed section prevents an arc being drawn from one live section to the other, as the voltage difference may be higher than the normal system voltage if the live sections are on different phases and the protective circuit breakers may not be able to safely interrupt the considerable current that would flow. To prevent the risk of an arc being drawn across from one section of wire to earth, when passing through the neutral section, the train must be coasting and the circuit breakers must be open. In many cases, this is done manually by the drivers. To help them, a warning board is provided just before both the neutral section and an advance warning some distance before. A further board is then provided after the neutral section to tell drivers to re-close the circuit breaker, although drivers must not do this until the rear pantograph has passed this board. In the UK, a system known as Automatic Power Control (APC) automatically opens and closes the circuit breaker, this being achieved by using sets of permanent magnets alongside the track communicating with a detector on the train. The only action needed by the driver is to shut off power and coast and therefore warning boards are still provided at and on the approach to neutral sections.

What should the driver do in order to open and close the circuit breaker?
Answer: to shut off power and coast

Problem: Near East (French: Proche-Orient) is a geographical term that roughly encompasses Western Asia. Despite having varying definitions within different academic circles, the term was originally applied to the maximum extent of the Ottoman Empire. The term has fallen into disuse in English, and has been replaced by the term Middle East.
The term near east was originally applies to the maximum extent of what empire?
The answer is the following: Ottoman Empire

The earthquake also provided opportunities for researchers to retrofit data in order to model future earthquake predictions. Using data from the Intermagnet Lanzhou geomagnetic observatory, geologists Lazo Pekevski from the Ss. Cyril and Methodius University of Skopje in Macedonia and Strachimir Mavrodiev from the Bulgarian Academy of Sciences attempted to establish a "time prediction method" through collecting statistics on geomagnetism with tidal gravitational potential. Using this method, they were said to have predicted the time of the 2008 Sichuan earthquake with an accuracy of 1 day. The same study, however, acknowledges the limitation of earthquake prediction models, and does not mention that the location of the quake could be accurately predicted.
What did the professors predict?
the time of the 2008 Sichuan earthquake

Input: Anti-aircraft warfare
As this process continued, the missile found itself being used for more and more of the roles formerly filled by guns. First to go were the large weapons, replaced by equally large missile systems of much higher performance. Smaller missiles soon followed, eventually becoming small enough to be mounted on armored cars and tank chassis. These started replacing, or at least supplanting, similar gun-based SPAAG systems in the 1960s, and by the 1990s had replaced almost all such systems in modern armies. Man-portable missiles, MANPADs as they are known today, were introduced in the 1960s and have supplanted or even replaced even the smallest guns in most advanced armies.

Small missiles were designed that could be mounted on what?
Output: armored cars and tank chassis

Problem: Please answer a question about the following article about Gamal Abdel Nasser:
After the three-year transition period ended with Nasser's official assumption of power, his domestic and independent foreign policies increasingly collided with the regional interests of the UK and France. The latter condemned his strong support for Algerian independence, and the UK's Eden government was agitated by Nasser's campaign against the Baghdad Pact. In addition, Nasser's adherence to neutralism regarding the Cold War, recognition of communist China, and arms deal with the Eastern bloc alienated the United States. On 19 July 1956, the US and UK abruptly withdrew their offer to finance construction of the Aswan Dam, citing concerns that Egypt's economy would be overwhelmed by the project.
The UK was chafed by Nasser's opposition to what agreement?
A:
Baghdad Pact