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: A physical change in matter is a change in one or more of matters physical properties. Glass breaking is just one example of a physical change. Some other examples are shown in Figure 3.16 and in the video below. In each example, matter may look different after the change occurs, but its still the same substance with the same chemical properties. For example, smaller pieces of wood have the ability to burn just as larger logs do. MEDIA Click image to the left or use the URL below. URL: Because the type of matter remains the same with physical changes, the changes are often easy to undo. For example, braided hair can be unbraided again. Melted chocolate can be put in a fridge to re-harden. Dissolving salt in water is also a physical change. How do you think you could undo it? Did you ever make a "volcano," like the one in Figure 3.17, using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance with different chemical properties. When vinegar and baking soda combine, they form carbon dioxide, a gas that causes the bubbles. Its the same gas that gives soft drinks their fizz. Not all chemical changes are as dramatic as this "volcano." Some are slower and less obvious. Figure 3.18 and the video below show other examples of chemical changes. MEDIA Click image to the left or use the URL below. URL: How can you tell whether a chemical change has occurred? Often, there are clues. Several are demonstrated in Figures 3.17 and 3.18 and in the video below. MEDIA Click image to the left or use the URL below. URL: To decide whether a chemical change has occurred, look for these signs: Gas bubbles are released. (Example: Baking soda and vinegar mix and produce bubbles.) Something changes color. (Example: Leaves turn from green to other colors.) An odor is produced. (Example: Logs burn and smell smoky.) A solid comes out of a solution. (Example: Eggs cook and a white solid comes out of the clear liquid part of the egg.) Because chemical changes produce new substances, they often cannot be undone. For example, you cant change a fried egg back to a raw egg. Some chemical changes can be reversed, but only by other chemical changes. For example, to undo the tarnish on copper pennies, you can place them in vinegar. The acid in the vinegar reacts with the tarnish. This is a chemical change that makes the pennies bright and shiny again. You can try this yourself at home to see how well it works. If you build a campfire, like the one in Figure 3.19, you start with a large stack of sticks and logs. As the fire burns, the stack slowly shrinks. By the end of the evening, all thats left is a small pile of ashes. What happened to the matter that you started with? Was it destroyed by the flames? It may seem that way, but in fact, the same amount of matter still exists. The wood changed not only to ashes but also to carbon dioxide, water vapor, and other gases. The gases floated off into the air, leaving behind just the ashes. Assume you had measured the mass of the wood before you burned it. Assume you had also trapped the gases released by the burning wood and measured their mass and the mass of the ashes. What would you find? The ashes and gases combined have the same mass as the wood you started with. This example illustrates the law of conservation of mass. The law states that matter cannot be created or destroyed. Even when matter goes through physical or chemical changes, the total mass of matter always remains the same. (In the chapter Nuclear Chemistry, you will learn about nuclear reactions, in which mass is converted into energy. But other than that, the law of conservation of mass holds 
 Question: After a physical change, matter may
[A]: look different.


[Q]: Context: Adolphe Lechaptois (8 June 1852 -- 30 November 1917) was a priest of the White Fathers missionary society who was Vicar Apostolic of Tangyanika from 1891 until his death in 1917, in what is now Tanzania. 
 Question: What group was Adolphe Lechaptois a member of?
[A]: white fathers


[Q]: Context: Asia has many wild places. The following national parks are among the most famous in Asia. People come to visit them from near and far in order to appreciate the unique qualities of the land and everything on it. Have you ever visited any of these Asian national parks? Jiuzhai Valley National Park, China The extraordinarily beautiful park is famous for its fascinating blue-green lakes, waterfalls and its unique wildlife. Located in the Minshan Mountain, Sichuan Province, it is a breathtaking park because of its scenery and it is also home to nine Tibetan villages, over 220 bird species as well as a number of endangered animals and plants, such as giant pandas, Sichuan golden monkeys and numerous _ . This park was also declared a UNESCO World Heritage Site in 1992. Khao Sok National Park, Thailand This extraordinary park is several miles away from Phuket , yet its remoteness prevents it from being visited. Even so, it is well worth a visit as scientists have noted that is rainforest stretches are not only longer than those of the Amazon, but also more divers . Animals like tigers, Asian elephants, and macaaues make their home here. Everyone who visits the park, however, seems to want to have a look at the amazing Rafflesia, one of the strangest flowering plants on earth; it smells like smelly meat when it blooms. Nikko National Park, Japan It is lovely to visit this park all the year round with its waterfalls and picturesque Lake Chuzenji. And it is especially worth visiting in autumn when the leaves change from green to deep red and orange. Set with UNESCO protected shrines and temples, the park is a unique mixture of natural and man-made attractions. With various routes perfect for adventurous hikers, a visit to the Nikko National Park is not to be missed. If you want to know more information about Asian famous national parks, you can log in [Link] If you want to enjoy all the above, welcome to call 050-24689120, and we can give a reasonable price. 
 Question: If you're an adventurous hiker, which park would you probably choose to visit?
[A]:
nikko national park.