In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

Ex Input:
A flood occurs when a river overflows its banks. This might happen because of heavy rains. Floodplains In very flat regions, flood water may spread out on the surface of the land. It then slows down and drops its sediment. If a river floods often, a floodplain develops. A floodplain is an area where a thick layer of rich soil is left behind as the floodwater recedes. Thats why floodplains are usually good places for growing plants. They are very flat areas and they have very rich soils. The Nile River valley is a great example of a floodplain. Each year, the Nile River rises over its banks. This floodwater carries a lot of sediment. This sediment has been eroded off areas of land from upstream. This sediment is dropped as the water slows down after spreading across the land. What is left behind is a very rich soil. Thats why crops can be raised in the middle of a sandy desert. Natural Levees A flooding river often forms natural levees along its banks. A levee is a raised strip of sediments deposited close to the waters edge. <sep>What may cause a river to flood and overflow its banks?<sep>Upstream erosion

Ex Output:
No

Ex Input:
In the popular mind, the history of Hong Kong, long the entryway to China for Westerners, begins in 1841 with the British occupation of the territory. However, it would be wrong to dismiss the long history of the region itself. Archaeologists today are working to uncover Hong Kong's past, which stretches back thousands of years. You can get a glimpse into that past at Lei Cheng Uk Museum's 1,600-year-old burial vault on the mainland just north of Kowloon. In 1992, when construction of the airport on Chek Lap Kok was begun, a 2,000-year-old village, Pak Mong, was discovered, complete with artifacts that indicated a sophisticated rural society. An even older Stone Age site was discovered on Lamma Island in 1996. While Hong Kong remained a relative backwater in early days, nearby Guangzhou (Canton) was developing into a great trading city with connections in India and the Middle East. By a.d. 900, the Hong Kong islands had become a lair for pirates preying on the shipping in the Pearl River Delta and causing a major headache for burgeoning Guangzhou; small bands of pirates were still operating into the early years of the 20th century. In the meantime, the mainland area was being settled by incomers, the "Five Great Clans": Tang, Hau, Pang, Liu, and Man. First to arrive was the Tang clan, which established a number of walled villages in the New Territories that still exist today. You can visit Kat Hing Wai and Lo Wai, villages with their walls still intact. Adjacent to Lo Wai is the Tang Chung Ling Ancestral Hall, built in the 16th century, which is still the center of clan activities. The first Europeans to arrive in the Pearl River Delta were the Portuguese, who settled in Macau in 1557 and for several centuries had a monopoly on trade between Asia, Europe, and South America. As Macau developed into the greatest port in the East, it also became a base for Jesuit missionaries; it was later a haven for persecuted Japanese Christians. While Christianity was not a great success in China, it made local headway, evidenced today by the numerous Catholic churches in Macau's historic center. Intermarriage with the local Chinese created a community of Macanese, whose culture can still be seen in Macau's architecture and cuisine. <sep>Who were the first Europeans to control the greatest port in the East?<sep>South Africans

Ex Output:
No

Ex Input:
During the transition, Bush had chosen John Ashcroft, a former senator from Missouri, as his attorney general. On his arrival at the Justice Department, Ashcroft told us, he faced a number of problems spotlighting the need for reform at the FBI. In February, Clarke briefed Attorney General Ashcroft on his directorate's issues. He reported that at the time, the attorney general acknowledged a "steep learning curve," and asked about the progress of the Cole investigation. Neither Ashcroft nor his predecessors received the President's Daily Brief. His office did receive the daily intelligence report for senior officials that, during the spring and summer of 2001, was carrying much of the same threat information. The FBI was struggling to build up its institutional capabilities to do more against terrorism, relying on a strategy called MAXCAP 05 that had been unveiled in the summer of 2000. The FBI's assistant director for counterterrorism, Dale Watson, told us that he felt the new Justice Department leadership was not supportive of the strategy. Watson had the sense that the Justice Department wanted the FBI to get back to the investigative basics: guns, drugs, and civil rights. The new administration did seek an 8 percent increase in overall FBI funding in its initial budget proposal for fiscal year 2002, including the largest proposed percentage increase in the FBI's counterterrorism program since fiscal year 1997. The additional funds included the FBI's support of the 2002 Winter Olympics in Salt Lake City, Utah (a onetime increase), enhanced security at FBI facilities, and improvements to the FBI's WMD incident response capability. In May, the Justice Department began shaping plans for building a budget for fiscal year 2003, the process that would usually culminate in an administration proposal at the beginning of 2002. On May 9, the attorney general testified at a congressional hearing concerning federal efforts to combat terrorism. He said that "one of the nation's most fundamental responsibilities is to protect its citizens from terrorist attacks." The budget guidance issued the next day, however, highlighted gun crimes, narcotics trafficking, and civil rights as priorities. <sep>Who said that "one of the nation's most fundamental responsibilities is to protect its citizens from terrorist attacks."<sep>Ashcroft

Ex Output:
Yes