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:
Dam Good Luck: From the beginning, Las Vegas was built to serve travelers. The railroad needed a way station, and Las Vegas was the place. Growth continued for ten years, and by 1915 the town had telephones, round-the-clock electricity, and a growing populationmany of whom worked in the railroad repair shop. But such heady progress would soon come to a halt. The growing competition in rail transport resulted in Union Pacific buying the Los AngelesSalt Lake line. Union Pacific then consolidated its operations, eliminating the Las Vegas repair facility. Additionally, Las Vegas had been made a part of Nevada's new Clark County in 1909, a year when the legislature also outlawed gambling. These unfortunate circumstances threatened to relegate Las Vegas to the status of a small desert community that could no longer support its 3000 residents. But the southwest's growing need for water, combined with Las Vegas's fortuitous proximity to the Colorado River, would give Las Vegas a second chance to achieve prosperity. Construction on Hoover Dam (originally Boulder Dam, subsequently renamed for the president who authorized the project) began in 1931 in a canyon 45 miles (72 km) southeast of Las Vegas. Providing an influx of $165 million to the southwestern economy, Hoover Dam played a major role in preventing Las Vegas from drying up, both financially and literally. Not only did it create jobs, but it also created Lake Mead, the massive reservoir that today provides water to all of southern Nevada. More Government Help: The construction of Hoover Dam did not single-handedly save Las Vegas, however. The state legislature helped as well, by legalizing gambling in 1931 and thus solidifying the future of the town, though legislators and residents could never have known this at the time. The hordes of people who attended Hoover Dam's 1935 dedication set the city's now-formidable public relations machine into action. They went to work on what has become one of the lengthiest citywide tourism campaigns ever attempted. It didn't take long for the city to establish itself as a wild-West town with an "anything goes" attitude. Vices outlawed or heavily controlled elsewhere were legal here, available any hour of any day (or night). <sep>What was the answer to the southwest's need for water?<sep>The Hoover Dam construction
answer:
Yes

question:
At the age of eighteen there came a change in Poe's life. Until then he had been a petted child in a wealthy family. Mr. Allan did not have that affection for him which Mrs. Allan had. He did not understand the boy's peculiar and erratic nature, and was particularly displeased when he found that Edgar had run into debt at college. There was an angry scene between the two, and Edgar was told that he must leave the university and go into the counting-room. It appears that he made some attempt to tie himself down to figures and accounts and business routine; but as he had not been brought up to this kind of life, he soon tired of it, and decided to go into the world to seek his own fortune. He went to Boston, where he published a volume of poetry. In the preface to this volume, Poe says that the poems were written before he was fourteen. Though this may not be strictly true, there is little doubt that some of them were. While he was still at school he had collected enough of his poems to make a volume, and Mr. Allan had taken them up to the master of the English and Classical School to get his advice about publishing them. This gentleman advised against it on the ground that it would make Edgar conceited,--a fault from which he was already suffering. As soon as he was free to do as he pleased, therefore, it was natural that he should rewrite his poems and publish them. <sep>Why was Poe forced to leave the university?<sep>He made some attempt to tie himself down to figures and accounts and business routine
answer:
No

question:
Water flowing over Earths surface or underground causes erosion and deposition. Water flowing over a steeper slope moves faster and causes more erosion. How water transports particles depends on their size. When water slows down, it starts depositing sediment. This process starts with the largest particles first. Runoff erodes the land after a heavy rain. It picks up sediment. Runoff carries most of the sediment to bodies of water. Mountain streams erode narrow, V-shaped valleys and waterfalls. Erosion and deposition by slow-flowing rivers create broad floodplains and meanders. Deposition by streams and rivers may form alluvial fans and deltas. Floodwaters may deposit natural levees. Erosion and deposition by groundwater can form caves and sinkholes. Stalactites and stalagmites are mineral deposits. They build up in caves as water continues to drip. <sep>Where do stalactites and stalagmites occur?<sep>In deltas
answer:
No