instruction:
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.
question:
Context: From the outside, the skin looks plain and simple, as you can see in Figure 16.5. But at a cellular level, theres nothing plain or simple about it. A single square inch of skin contains about 20 blood vessels, hundreds of sweat glands, and more than a thousand nerve endings. It also contains tens of thousands of pigment-producing cells. Clearly, there is much more to skin than meets the eye! For a dramatic introduction to the skin, watch this video: MEDIA Click image to the left or use the URL below. URL: The skin is only about 2 mm thick, or about as thick as the cover of a book. Although it is very thin, it consists of two distinct layers, called the epidermis and the dermis. You can see both layers and some of their structures in Figure 16.6. Refer to the figure as you read about the epidermis and dermis below. The epidermis is the outer layer of skin. It consists almost entirely of epithelial cells. There are no blood vessels, nerve endings, or glands in this skin layer. Nonetheless, this layer of skin is very active. It is constantly being renewed. How does this happen? 1. The cells at the bottom of the epidermis are always dividing by mitosis to form new cells. 2. The new cells gradually move up through the epidermis toward the surface of the body. As they move, they produce the tough, fibrous protein called keratin. 3. By the time the cells reach the surface, they have filled with keratin and died. On the surface, the dead cells form a protective, waterproof layer. 4. Dead cells are gradually shed from the surface of the epidermis. As they are shed, they are replaced by other dead cells that move up from below. The epidermis also contains cells called melanocytes. You can see a melanocyte in Figure 16.7. Melanocytes produce melanin. Melanin is a brown pigment that gives skin much of its color. Everyones skin has about the same number of melanocytes per square inch. However, the melanocytes of people with darker skin produce more melanin. The amount of melanin that is produced depends partly on your genes and partly on how much ultraviolet light strikes your skin. The more light you get, the more melanin your melanocytes produce. This explains why skin tans when its exposed to sunlight. The dermis is the inner layer of skin. It is made of tough connective tissue. The dermis is attached to the epidermis by fibers made of the protein collagen. The dermis is where most skin structures are located. Look again at Figure pain, pressure, and temperature. If you cut your skin and it bleeds, the cut has penetrated the dermis and damaged a blood vessel. The cut probably hurts as well because of the nerve endings in this skin layer. The dermis also contains hair follicles and two types of glands. You can see some of these structures in Figure 16.8. Hair follicles are structures where hairs originate. Each hair grows out of a follicle, passes up through the epidermis, and extends above the skin surface. Sebaceous glands are commonly called oil glands. They produce an oily substance called sebum. Sebum is secreted into hair follicles. Then it makes its way along the hair shaft to the surface of the skin. Sebum waterproofs the hair and skin and helps prevent them from drying out. Sweat glands produce the salty fluid known as sweat. Sweat contains excess water, salts, and other waste products. Each sweat gland has a duct that passes through the epidermis. Sweat travels from the gland through the duct and out through a pore on the surface of the skin. You couldnt survive without your skin. It has many important functions. In several ways, it helps maintain homeostasis. The main function of the skin is controlling what enters and leaves the body. It prevents the loss of too much water from the body. It also prevents bacteria and other microorganisms from entering the body. Melanin in the epidermis absorbs ultraviolet light. This prevents the light from reaching and damaging the dermis. The skin helps maintain a constant body temperature. It 
 Question: __major organ of the integumentary system
answer:
skin


question:
Context: The Neponset River forms the boundary between Boston's southern neighborhoods and the city of Quincy and the town of Milton. 
 Question: What body of water was Boston next to?
answer:
neponset river


question:
Context: Well-known companies are powered by their names and reputations. When people walk into a Pizza Hut in Tokyo, Rome, or Miami, they know exactly what they are getting. Through franchising, an investor can make use of this brand power by opening a Pizza Hut of his or her own. The risk is low, and the rewards can be big. No wonder franchising is such a successful business model. Franchising had been around for more than 100 years, but its popularity took off in the 1950s. Leading the trend were fast food restaurant like McDonald's. These days, there are franchises in more than eighty-five industries, including dry cleaning, hotels and supermarkets. It's a very big business. In the US, there are some 760,000 franchises, totaling more than $1.5 trillion in yearly revenues (income). There are two sides in a franchise: the franchisor--the owner of the business system and the franchisee--the person who licenses the system. After signing a "franchise agreement", the franchisee pays a fee. He or she also pays for equipment, supplies, and, if necessary, building costs. The total investment usually ranges from $10,000 to $1,000,000. After the business opens, the franchisee also pays a percentage of sales revenues--called a royalty--to the franchisor. Marking fees must also be paid. In return, the franchisee receives many benefits. Training is among the most common ones. It includes everything from dealing with customers to understanding the company's standards. The franchisor also handles advertising. On top of that, there's the benefit of the brand reputation that the company has built up. All of these benefits make the risk of opening a franchise much smaller than that of starting a business from scratch. However, a franchise can also have drawbacks. If a customer at a single restaurant gets sick, it may hurt every franchise in the system. Running a franchise also means closely following the company's standards. So, one has to give up a degree of independence. You have to do things their way and trust that the system will work. If you want to earn a lot of money from the business, you have to work hard. Also, remember that the monthly royalty must be paid, even if you are losing money. However, there are thousands of opportunities in franchising. They will surely grow as brand recognition becomes more important in the global economy . 
 Question: What is the most important factor to make a franchise successful?
answer:

brand power.