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 Q]: So what is gravity? A typical definition of gravity is that it is a force. It causes an attraction between two masses. According to this definition, anything that has mass exerts a force. Any object exerts gravity on other objects. It does not matter how small it is, it has gravity. The more matter an object has, the more gravity it has. Your pencil has a tiny bit of gravity, but far too little to notice. What about a planet? It would have a lot of gravity. An objects gravity exerts a pull on other objects. Friction only occurs between objects that are touching. Gravity can act between objects that are not touching. In fact, gravity can act over very long distances. Where else can you feel gravity? <sep>How do objects interact under gravity?<sep>gravity causes an attraction between two masses
[EX A]: Yes

[EX Q]: Alexander earned the epithet "The Great" due to his unparalleled success as a military commander. He never lost a battle, despite typically being outnumbered. This was due to use of terrain, phalanx and cavalry tactics, bold strategy, and the fierce loyalty of his troops. The Macedonian phalanx, armed with the sarissa, a spear 6 metres (20 ft) long, had been developed and perfected by Philip II through rigorous training, and Alexander used its speed and maneuverability to great effect against larger but more disparate Persian forces. Alexander also recognized the potential for disunity among his diverse army, which employed various languages and weapons. He overcame this by being personally involved in battle, in the manner of a Macedonian king. In his first battle in Asia, at Granicus, Alexander used only a small part of his forces, perhaps 13,000 infantry with 5,000 cavalry, against a much larger Persian force of 40,000. Alexander placed the phalanx at the center and cavalry and archers on the wings, so that his line matched the length of the Persian cavalry line, about 3 km (1.86 mi). By contrast, the Persian infantry was stationed behind its cavalry. This ensured that Alexander would not be outflanked, while his phalanx, armed with long pikes, had a considerable advantage over the Persian's scimitars and javelins. Macedonian losses were negligible compared to those of the Persians. At Issus in 333 BC, his first confrontation with Darius, he used the same deployment, and again the central phalanx pushed through. Alexander personally led the charge in the center, routing the opposing army. At the decisive encounter with Darius at Gaugamela, Darius equipped his chariots with scythes on the wheels to break up the phalanx and equipped his cavalry with pikes. Alexander arranged a double phalanx, with the center advancing at an angle, parting when the chariots bore down and then reforming. The advance was successful and broke Darius' center, causing the latter to flee once again. When faced with opponents who used unfamiliar fighting techniques, such as in Central Asia and India, Alexander adapted his forces to his opponents' style. Thus, in Bactria and Sogdiana, Alexander successfully used his javelin throwers and archers to prevent outflanking movements, while massing his cavalry at the center. <sep>How did Alexander use the phalanx in the battle of Granicus?<sep>Armed with the sarissa
[EX A]: No

[EX Q]: With a budget of $329 million, LSC provides civil legal assistance to low-income people in every county in America, Kleiman said. NLAP was created in 1968. A decade later, the agency used a $50,000 LSC grant to buy a building at 438 King St. in Charleston and $33,000 to buy a building at 201 King St. in Georgetown, according to Erlenborn's letter to Kaynard. In 1980, NLAP used $63,000 in LSC funds to buy property at 607 Main St. in Conway, the letter said. On Nov. 14, 2001, NLAP transferred title of the King Street building in Charleston to the Charleston County Bar Association, according to county property records. The local bar paid $5 for the building, which sits between a redeveloped office building and an antique shop. The local bar said it would maintain the building for "legal services to indigent residents of Charleston County and coastal South Carolina," the records said. The King Street building appears to be vacant. Notices at the entrance direct visitors to the equal justice center on West Montague Avenue in North Charleston. E. Douglas Pratt-Thomas, president of the local bar, was not available for comment. Charleston County has not appraised the King Street property because it is tax-exempt. But Randall Goldman, managing partner of Patrick Properties, which owns buildings from 440 to 456 King St., said he estimates 438 King St. would sell for between $700,000 and $900,000. "That building, which was purchased solely with federal legal aid dollars, should be used to provide legal services for poor people in South Carolina," Kleiman said. LSC wants the title to go to the equal justice center in Charleston or "we want 100 percent of the proceeds from the sale of the building to stay in Charleston. We are not contemplating taking that money out of South Carolina," he said. Kleiman said if the neighborhood legal program in Charleston "had honored their obligation, this would not be an issue." <sep>How many years after buying buildings in Charleston and Georgetown did the NLAP buy again?<sep>5 years
[EX A]:
No