instruction:
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".
question:
Alexander II (Russian: Aleksandr II Nikolaevich, tr. Aleksandr II Nikolaevich; IPA: [aljI'ksandr fta'roj njIka'lajIvjItc]; 29 April [O.S. 17 April] 1818 in Moscow - 13 March [O.S. 1 March] 1881 in Saint Petersburg) was the Emperor of Russia from 2 March 1855 until his assassination in 1881. He was also the King of Poland and the Grand Duke of Finland. Alexander was the most successful Russian reformer since Peter the Great. His most important achievement was the emancipation of serfs in 1861, for which he became known as Alexander the Liberator (Russian: Aleksandr Osvoboditel', tr. Aleksandr Osvoboditel; IPA: [aljI'ksandr asv@ba'djitjIlj]). The tsar was responsible for numerous other reforms including reorganizing the judicial system, setting up elected local judges, abolishing capital punishment, promoting local self-government through the zemstvo system, imposing universal military service, ending some of the privileges of the nobility, and promoting the universities. Despite these reforms, during his reign, his brutal secret police, known as the Third Section, sent thousands of dissidents into exile in Siberia. In foreign policy, Alexander sold Alaska to the United States in 1867, fearing the remote colony would fall into British hands if there was another war. He sought peace, moved away from bellicose France when Napoleon III fell in 1871, and in 1872 joined with Germany and Austria in the League of the Three Emperors that stabilized the European situation. Despite his otherwise pacifistic foreign policy, he fought a brief war with Turkey in 1877-78, pursued further expansion into Siberia and the Caucasus, and conquered Turkestan. Although disappointed by the results of the Congress of Berlin in 1878, Alexander abided by that agreement. Among his greatest domestic challenges was an uprising in Poland in 1863, to which he responded by stripping that land of its separate Constitution and incorporating it directly into Russia. Alexander was proposing additional parliamentary reforms to counter the rise of nascent revolutionary and anarchistic movements when he was assassinated in 1881. <sep>Why is Alexander II called Aleksandr Osvoboditel?<sep>For his emancipation of serfs
answer:
Yes

question:
Imagine you are standing in a farm field in central Illinois. The land is so flat you can see for miles and miles. On a clear day, you might see a grain silo 20 miles away. You might think to yourself, it sure is flat around here. If you drive one hundred miles to the south, the landscape changes. In southern Illinois, there are rolling hills. Why do you think this is? What could have caused these features? There are no big rivers that may have eroded and deposited this material. The ground is capable of supporting grass and trees, so wind erosion would not explain it. To answer the question, you need to go back 12,000 years. Around 12,000 years ago, a giant ice sheet covered much of the Midwest United States. Springfield, Illinois, was covered by over a mile of ice. Its hard to imagine a mile thick sheet of ice. The massive ice sheet, called a glacier, caused the features on the land you see today. Where did glaciers go? Where can you see them today? Glaciers are masses of flowing ice. <sep>What couldn't the erosion have been caused by?<sep>Wind
answer:
Yes

question:
Federal agents on Tuesday raided a South Florida office of Dr. Salomon Melgen, an eye doctor whose past issues with authorities had already entangled Sen. Robert Menendez. With yellow crime tape strung up outside, men and women lugged box after box of materials from Melgen's West Palm Beach office into awaiting minivans. Both members of the federal Health and Human Services department and the Federal Bureau of Investigation took part in the search, which FBI Special Agent Michael Leverock said was the second at the same Melgen clinic -- the other coming last January. "As this is part of an ongoing investigation, (authorities have) no further comment/information at this time," said Leverock. That means no official details as to what authorities were looking for. Even if it has nothing to do with his record as a generous political donor, Tuesday's raid suggests Melgen's legal troubles and perhaps their negative impact on Menendez, the senior U.S. senator from New Jersey are far from over. Confessions show sex claims were 'false smears,' senator says The doctor's lawyer contended that Tuesday's search was the government's way of getting back at Melgen, after he sued over Medicare payments. Even so, Matthew Menchel, the attorney, said that Melgen will continue to work with authorities. "While we believe that today's intrusion was in retaliation and there was no legitimate need for the search, the FBI's actions will not prevent Dr. Melgen from continuing his full cooperation with the government," Menchel said. The doctor first came to the attention of many around Washington when The Daily Caller, a conservative website, published a report shortly before the November 2012 election citing several Dominican women who claimed they'd had sex with Menendez for money. The New Jersey Democrat staunchly denied the accusation. And in March, Dominican police announced three women had been paid to claim -- falsely -- that they had sex with Menendez. While that part of the story died down, the episode raised questions about why and how Menendez admittedly flew to the Dominican Republic three times in 2010 on Melgen's private plane. <sep>Who published an accusation and who denied it?<sep>The Daily Caller, Menendez
answer:
Yes