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.

Example Input: Context: The Jack Sport was a French automobile manufactured from 1925 until 1930. 
 Question: What year was the end of Jack Sport?
Example Output: 1930

Example Input: Context: When a new moon passes directly between the Earth and the Sun, it causes a solar eclipse (Figure 24.20). The Moon casts a shadow on the Earth and blocks our view of the Sun. This happens only all three are lined up and in the same plane. This plane is called the ecliptic. The ecliptic is the plane of Earths orbit around the Sun. The Moons shadow has two distinct parts. The umbra is the inner, cone-shaped part of the shadow. It is the part in which all of the light has been blocked. The penumbra is the outer part of Moons shadow. It is where the light is only partially blocked. When the Moons shadow completely blocks the Sun, it is a total solar eclipse (Figure 24.21). If only part of the Sun is out of view, it is a partial solar eclipse. Solar eclipses are rare events. They usually only last a few minutes. That is because the Moons shadow only covers a very small area on Earth and Earth is turning very rapidly. Solar eclipses are amazing to experience. It appears like night only strange. Birds may sing as they do at dusk. Stars become visible in the sky and it gets colder outside. Unlike at night, the Sun is out. So during a solar eclipse, its easy to see the Suns corona and solar prominences. This NASA page will inform you on when solar eclipses are expected: [Link] Sometimes a full moon moves through Earths shadow. This is a lunar eclipse (Figure 24.22). During a total lunar eclipse, the Moon travels completely in Earths umbra. During a partial lunar eclipse, only a portion of the Moon enters Earths umbra. When the Moon passes through Earths penumbra, it is a penumbral eclipse. Since Earths shadow is large, a lunar eclipse lasts for hours. Anyone with a view of the Moon can see a lunar eclipse. Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common. The Moon glows with a dull red coloring during a total lunar eclipse. The Moon does not produce any light of its own. It only reflects light from the Sun. As the Moon moves around the Earth, we see different parts of the Moon lit up by the Sun. This causes the phases of the Moon. As the Moon revolves around Earth, it changes from fully lit to completely dark and back again. A full moon occurs when the whole side facing Earth is lit. This happens when Earth is between the Moon and the Sun. About one week later, the Moon enters the quarter-moon phase. Only half of the Moons lit surface is visible from Earth, so it appears as a half circle. When the Moon moves between Earth and the Sun, the side facing Earth is completely dark. This is called the new moon phase. Sometimes you can just barely make out the outline of the new moon in the sky. This is because some sunlight reflects off the Earth and hits the Moon. Before and after the quarter-moon phases are the gibbous and crescent phases. During the crescent moon phase, the Moon is less than half lit. It is seen as only a sliver or crescent shape. During the gibbous moon phase, the Moon is more than half lit. It is not full. The Moon undergoes a complete cycle of phases about every 29.5 days. 
 Question: phase of the moon in which the entire side facing Earth is dark
Example Output: new moon

Example Input: Context: Education plays a very important role in everybody's life. We go to school because we want to know more about the world around us. The typical classroom used to be the place where teachers and students were working and exploring the wonderful world of knowledge together, but now everything has changed. The Internet is one of those approaches. Learning via the Internet is a new style that seems to become successful than the traditional teaching. The Internet provides schools with a large amount of learning material that is accessible to students online. Owing to the choices of courses online, completing a program becomes much easier. We used to go to the library when we needed information and spend hours searching for the right sources. Today there is a "library" in our house and it is available 24 hours a day. From my personal experience, being a first time mother, I find that using information online is very helpful. While I am at home with my baby, I can still search for the material I need and exchange thoughts and information with my classmates without leaving my house. The Internet is not only a big information provider but also a money and time saver. People predict that education will be much cheaper in the future because of Internet access to information. The cost of land, building and wages for teachers are continuously increasing. In addition, regular courses (offline) depend heavily on books and other paper-based materials, while online education posts lectures, and assignments electronically, which saves thousands of dollars every year. With no physical restrictions, the Internet classes and courses are also very convenient. In classroom-based education there is a limitation on the number of students while Internet education is available to everyone. Students don't have to struggle in order to register for classes they like. Students will have more choices to take their courses and classes online. The Internet offers a wonderful opportunity to obtain knowledge in a more convenient and less expensive way. In my opinion, online life in the future is simply inescapable. 
 Question: What is the best title of the passage?
Example Output:
online education