Input: What if two children push a swing at the same time? Would the swing go higher? Yes, together their force would be more. It is common for forces to be combined. Most objects on Earth have at least two forces acting on them. Do you know what one of them is? Of course, that force is gravity. How many forces do you have on you right now? Gravity pulls you down toward the center of Earth. Your legs exert a downward force. They hold you up against the pull of gravity. Consider the example in Figure 1.3. A book is resting on a table. Gravity pulls the book downward. It has a force of 20 newtons. At the same time, the table pushes the book upward. Its force is also 20 newtons. The table opposes the pull of gravity.

Does the response "Gravity" correctly answer the question "What forces acts on a book on a table?"?
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Output: yes

Input: Plants also detect the daily cycle of light and darkness. Do you know how plants respond to these changes? Some plants open their leaves during the day. It is during these hours the plant can collect sunlight. At night, the plant closes its leaves to prevent water loss. Many plants respond to the change in the length of the day. As days grow shorter, some plants respond by going dormant. Dormant is when a plant suspends its growth. It does this in order to survive. Shorter days signal the coming of winter. Winter in most areas means extreme cold. It is also very dry in the winter months. As winter approaches, some plants respond by their leaves changing color. After the change in color, they fall off. This dormancy period helps trees. It allows them to survive the cold and dry winter. Plants only want to grow when conditions are right.

Does the response "They may change color and fall off" correctly answer the question "What two things happen to a plants' leaves as winter approaches?"?
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Output: yes

Input: Neighborhood Legal Services, which provides free legal services to the poor, has expanded into the San Gabriel and Pomona valleys, areas with large Asian populations, many of whom speak limited or no English. Language is their biggest obstacle, but the Asian communities' cultural isolation and service providers' lack of cultural expertise also play a part, said NLS executive director Neal Dubovitz. And with 13 percent to 15 percent of the Asian population in the U.S. living below the poverty line, NLS services are badly needed, Dubovitz said. "Although it is a significant part of the poverty population, Asians historically have not been able to participate in the services and programs available to the poor," he said. From simple telephone advice to complete legal representation in court, the agency provides free consumer, health, family, immigration, housing, public benefits and labor legal services to people who earn under $1,380 per month. Legal service providers have long served large Latino populations, who have cultural diversity but share a common language. "I remember the days when there were only a handful of people in the legal offices who spoke Spanish," Dudovitz said. "Now Spanish and English are interchangeable. Our goal is to have that for the major Asian languages as well." Before the expansion, only a few NLS lawyers spoke Asian languages, said attorney Rebecca Yee, who was hired by NLS in April 2002 to design and head the project. "Now we have people speaking Cantonese, Mandarin, Thai, Khmer (from Cambodia), Korean, Vietnamese, Japanese and Tagalog," Yee said. One of the 13 attorneys hired to work with the program is Irene Mak, a family law attorney who speaks Cantonese, Mandarin and Thai. Mak was a partner at a private law firm before she went to work for NLS two years ago, earning up to $20,000 less a year working on domestic violence cases. "The job is more satisfying than the money," said Mak, who grew up in Hong Kong and Thailand before coming to the United States. "I could use my language skills and wanted to give back to the Asian community." NLS expanded when Legal Services Corp., the federal agency that funds providers of free legal services nationwide, reduced the number of grantees in the Los Angeles area from five to three, Dudovitz said. NLS won the competitive grant over the Legal Services Program for Pasadena, San Gabriel-Pomona valleys. That boosted its client base from 16,000 to around 25,000, and NLS opened an office in El Monte.

Does the response "Spanish, Cantonese, Mandarin, Thai, Khmer (from Cambodia), Korean, Vietnamese, Japanese and Tagalog" correctly answer the question "What are some of the languages are now spoken by employees of the NLS?"?
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Output: yes

Input: From Babylon, Alexander went to Susa, one of the Achaemenid capitals, and captured its legendary treasury. He sent the bulk of his army to the Persian ceremonial capital of Persepolis via the Royal Road. Alexander himself took selected troops on the direct route to the city. He had to storm the pass of the Persian Gates (in the modern Zagros Mountains) which had been blocked by a Persian army under Ariobarzanes and then hurried to Persepolis before its garrison could loot the treasury. On entering Persepolis, Alexander allowed his troops to loot the city for several days. Alexander stayed in Persepolis for five months. During his stay a fire broke out in the eastern palace of Xerxes and spread to the rest of the city. Possible causes include a drunken accident or deliberate revenge for the burning of the Acropolis of Athens during the Second Persian War.

Does the response "A fire broke out" correctly answer the question "What incident happened that the possible causes may have been from a drunken accident or revenge?"?
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Output:
yes