Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Q: Context: English is an important global language, but that doesn't mean it's easy to learn. Many experts have tried to make English easier for students to learn--but they weren't always successful. In 1930, Professor CK Ogden of Cambridge University invented Basic English. It had only 850 words (and just eighteen verbs) and Ogden said most people could learn it in just thirty hours. The problem was that people who learned Basic English could write and say simple messages, but they couldn't understand the answers in "real" English! It was also impossible to explain a word if it wasn't in the Basic English word list. For example, if you wanted a watermelon, you asked for "a large green fruit with the form of an egg, which has a sweet red inside and a good taste"! RE Zachrisson, a university professor in Sweden, decided that the biggest problem for learners of English was spelling, so he invented a language called Anglic. Anglic was similar to English, but with much simpler spelling. "Father" became "faadher", "new" became "nue' and "years" became "yeerz". Unfortunately for some students of English, Anglic never became popular. Even easier is the language which ships' captains use: it's called "Seaspeak". Seaspeak uses a few simple phrases for every possible situation. In Seaspeak, for example, you don't say, "I'm sorry what did you say?" or "I didn't understand, can you repeat that?" It's just "Say again." No more grammar! In the age of international communication through the Internet who knows? ... a new form of English might appear. A large number of the world's e-mails are in English and include examples of "NetLingo" like OIC (Oh, I see) and TTYL (Talk to you later). In another fifty years, English might not exist ... we will probably all speak fluent Internetish! 
 Question: According to Professor Zachrisson, what was the biggest problem for learners of English?

A: spelling.
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Q: Context: However, the Seven Years' War ended on February 10, 1763 with the signing of the Treaty of Paris in Paris, France. Also, Silang was assassinated on May 28, 1763 by an Indio under the employ of the friars. The Spanish were then able to focus on the uprising and mustered forces to surround Palaris. The Spanish friars, who were allowed to stay in the province, also started a campaign to persuade Pangasinan residents of the futility of the Palaris Revolt. By September 1763, news of the peace treaty reached Pangasinan and army of Palaris' men surrendered and returned to normal life amid the Spanish offensive. Palaris tried to fend off the offensive at the village of Mabalitec near the Agno River between Binalatongan and Bayambang in December 1763. To prevent the Spanish from seeking lodging in his hometown, he ordered his men to raze Binalatongan. But the Spanish won the Battle of Mabalitec, demoralizing Palaris' forces. The town of Binalatongan was rebuilt in another site between December 1763 to June 1764 and renamed San Carlos , in honor of the reigning King Carlos III of Spain. Palaris' forces made a last stand at the town of San Jacinto, Pangasinan, but they were defeated. Palaris' advisers, Andres Lopez and Juan de Vera Oncantin, were captured. They would later be hanged. 
 Question: Which happened later, the the assassination of Silang or the Battle of Mabalitec?

A: battle of mabalitec
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Q: Context: While the United States continued missions to the Moon in the early 1970s, the Soviets worked to build a space station. A space station is a large spacecraft. People can live on this craft for a long period of time. Between 1971 and 1982, the Soviets put a total of seven Salyut space stations into orbit. Figure 23.22 shows the last of these, Salyut 7. These were all temporary stations. They were launched and later inhabited by a human crew. Three of the Salyut stations were used for secret military purposes. The others were used to study the problems of living in space. Cosmonauts aboard the stations performed a variety of experiments in astronomy, biology, and Earth science. Salyut 6 and Salyut 7 each had two docking ports. One crew could dock a spacecraft to one end. A replacement crew could dock to the other end. The U.S. only launched one space station during this time. It was called Skylab. Skylab was launched in May 1973. Three crews visited Skylab, all within its first year in orbit. Skylab was used to study the effects of staying in space for long period. Devices on board were and for studying the Sun. Skylab reentered Earths atmosphere in 1979, sooner than expected. The first space station designed for long-term use was the Mir space station (Figure 23.23). Mir was launched in several separate pieces. These pieces were put together in space. Mir holds the current record for the longest continued presence in space. There were people living on Mir continuously for almost 10 years! Mir was the first major space project in which the United States and Russia worked together. American space shuttles transported supplies and people to and from Mir. American astronauts lived on Mir for many months. This cooperation allowed the two nations to learn from each other. The U.S. learned about Russias experiences with long-duration space flights. Mir was taken out of orbit in 2001. It fell into the Pacific Ocean. The International Space Station, shown in Figure 23.24 is a joint project between the space agencies of many nations These include the United States (NASA), Russia (RKA), Japan (JAXA), Canada (CSA), several European countries (ESA) and the Brazilian Space Agency. The International Space Station is a very large station. It has many different sections and is still being assembled. The station has had people on board since 2000. American space shuttles deliver most of the supplies and equipment to the station. Russian Soyuz spacecraft carry people. The primary purpose of the station is scientific research. This is important because the station has a microgravity environment. Experiments are done in the fields of biology, chemistry, physics, physiology and medicine. NASA wanted a new kind of space vehicle. This vehicle had to be reusable. It had to able to carry large pieces of equipment, such as satellites, space telescopes, or sections of a space station. The new vehicle was called a space shuttle, shown in Figure 23.25. There have been five space shuttles: Columbia, Challenger, Discovery, Atlantis, and Endeavor. A space shuttle has three main parts. You are probably most familiar with the orbiter. This part has wings like At the end of the mission, the orbiter re-enters Earths atmosphere. The outside heats up as it descends. Pilots have to steer the shuttle to the runway very precisely. Space shuttles usually land at Kennedy Space Center or at Edwards Air Force Base in California. The orbiter is later hauled back to Florida on the back of a jet airplane. The space shuttle program has been very successful. Over 100 mission have been flown. Space shuttle missions have made many scientific discoveries. Crews have launched many satellites. There have been other great achievements in space. However, the program has also had two tragic disasters. The first came just 73 seconds after launch, on January 28, 1986. The space shuttle Challenger disintegrated in mid-air, as shown in Figure 23.27. On board were seven crew members. All of them died. One of them was Christa McAuliffe, who was to be the first teacher in space. 
 Question: reusable space vehicle for carrying equipment and people to and from space

A:
space shuttle
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