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.

Ex Input:
Context: Energy, or the ability to do work, can exist in many different forms. The photo in Figure 17.8 represents six of the eight different forms of energy that are described in this lesson. The guitarist gets the energy he needs to perform from chemical energy in food. He uses mechanical energy to pluck the strings of the guitar. The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat. The guitar also uses electrical energy, and it produces sound energy when the guitarist plucks the strings. For an introduction to all these forms of energy, go to this URL: . For an interactive animation about the different forms of energy, visit this URL: After you read below about different forms of energy, you can check your knowledge by doing the drag and drop quiz at this URL: . Mechanical energy is the energy of an object that is moving or has the potential to move. It is the sum of an objects kinetic and potential energy. In Figure 17.9, the basketball has mechanical energy because it is moving. The arrow in the same figure has mechanical energy because it has the potential to move due to the elasticity of the bow. What are some other examples of mechanical energy? Energy is stored in the bonds between atoms that make up compounds. This energy is called chemical energy, and it is a form of potential energy. If the bonds between atoms are broken, the energy is released and can do work. The wood in the fireplace in Figure 17.10 has chemical energy. The energy is released as thermal energy when the wood burns. People and many other living things meet their energy needs with chemical energy stored in food. When food molecules are broken down, the energy is released and may be used to do work. Electrons are negatively charged particles in atoms. Moving electrons have a form of kinetic energy called electrical energy. If youve ever experienced an electric outage, then you know how hard it is to get by without electrical energy. Most of the electrical energy we use is produced by power plants and arrives in our homes through wires. Two other sources of electrical energy are pictured in Figure 17.11. The nuclei of atoms are held together by powerful forces. This gives them a tremendous amount of stored energy, called nuclear energy. The energy can be released and used to do work. This happens in nuclear power plants when nuclei fission, or split apart. It also happens in the sun and other stars when nuclei fuse, or join together. Some of the suns energy travels to Earth, where it warms the planet and provides the energy for photosynthesis (see Figure The atoms that make up matter are in constant motion, so they have kinetic energy. All that motion gives matter thermal energy. Thermal energy is defined as the total kinetic energy of all the atoms that make up an object. It depends on how fast the atoms are moving and how many atoms the object has. Therefore, an object with more mass has greater thermal energy than an object with less mass, even if their individual atoms are moving at the same speed. You can see an example of this in Figure 17.13. Energy that the sun and other stars release into space is called electromagnetic energy. This form of energy travels through space as electrical and magnetic waves. Electromagnetic energy is commonly called light. It includes visible light, as well as radio waves, microwaves, and X rays (Figure 17.14). The drummer in Figure 17.15 is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy. We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. Thats because the energy needs particles of matter to pass it on. Energy often changes from one form to another. For example, the mechanical energy of a moving drumstick changes to sound energy when it strikes the drumhead and causes it to vibrate. Any 
 Question: energy of an object that is moving or has the potential to move

Ex Output:
mechanical energy


Ex 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

Ex Output:
new moon


Ex Input:
Context: The company "Spacely Sprockets and Spindles" is in dire trouble. Their latest project, dubbed the 'Orbiting Ore Asteroid,' has had numerous technical setbacks, doing only 3 days of work in over 6 months. To make matters worse, the vice-president in charge of operations, Alexander Throttle-bottom, has run off, making this the fourth vice-president that the operation has lost. Matters are further compounded when the site's assistant refuses to press the start button to activate the factory, or accept Spacely's offer for a promotion or raise.Using his secretarial computer, Spacely pegs George Jetson to be the new vice-president, sending George home to pack and tell his family. However, the news is met with with sadness, as the move will interfere with Jane's recycling program, Elroy's spaceball tournament, and Judy's date with rock star Cosmic Cosmo.Even so, the family manages to come together (with the exception of Judy who is sad about her missed date), and the family arrives at the 'Orbiting Ore Asteroid,' which not only houses the factory, but a shopping center and housing complex. The Jetsons meet their new neighbors, including Lucy-2, whose husband Rudy-2 works at the factory, and son Teddy-2 plays on the local spaceball team. They also meet the Furbolo family, including their mischievous daughter, Fergie.The next day, George arrives at work and meets Rudy-2. Rudy verses George on the factory equipment, and they prepare for the official start-up of the factory. Meanwhile, Jane and Judy go shopping with Lucy-2. Still feeling depressed, Judy goes off on her own, and meets a boy named Apollo Blue, whom she quickly develops a crush on.Later on that day, everyone turns out for the re-opening of the plant, with George activating the controls. However, the machine malfunctions again, irritating Spacely. Shortly thereafter, Rudy-2 reveals to George about previous technical issues with the plant, and cautions that it may be safer if George were to go home. George refuses, not wanting to give up on being vice-president. The next day, repairs appear to be made but the factory again malfunctions. Spacely blames George for the technical glitches, and leaves Earth to check on the factory.After inspecting the factory again, Rudy-2 reveals that the incidents do not appear to be accidents, but 'warnings' to shut down the plant. Rudy then explains about the factory's troubles, and of the 4 previous vice-presidents. George decides to stay overnight at the plant, and figure out just what is happening.Elroy and Teddy-2 sneak off to follow him. However, when their disappearance is found out, Jane asks Judy and Apollo Blue to try and find them. Judy and Apollo find both Elroy and Teddy-2 at the plant, along with Fergie, who tagged along. They also find a strange little creature, whose species Fergie identifies as a Grungee. The Grungee leads them into the core of the asteroid, where it is revealed why the factory keeps being sabotaged: The factory's enormous drill is destroying the Grungee's habitat in the base of the asteroid. The Grungees have been making the plant malfunction to keep their homes from being destroyed.Jane and Astro soon make their way into the factory, along with Rudy-2. Rudy stays in the factory, as Jane and Astro go below. Soon afterwards, they all find George, who had been bound and gagged by the Grungees. George has no idea why this has happened to him, untill Jane and the others explain.Shortly after this revelation, Mr Spacely arrives, and against Rudy-2's protestations, reactivates the drill, almost killing Elroy when it's actions cause a large amount of rock to collapse. The other Grungees manage to help him, and they all head top-side. After Mr Spacely refuses to stop the drill, George manage to make the system malfunction. When Spacely demands an explanation, George explains about the Grungees, and Spacely is soon found to have ignored reports that the asteroid was inhabited.A deal is made by which the Grungees operate the plant, 
 Question: Judy Jetson is having a hard time adjusting, and accepting the fact that she lost her chance at a date who?

Ex Output:

rock star cosmic cosmo