TASK DEFINITION: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
PROBLEM: Passage: In the 1970s, astronomers saw some major advances in astronomical imaging technology, beginning with Antoine Labeyrie's invention of speckle interferometry, a process that significantly reduced the blurring effect caused by astronomical seeing. It increased the optical resolution of ground-based telescopes, allowing for more precise measurements of Betelgeuse's photosphere. With improvements in infrared telescopy atop Mount Wilson, Mount Locke and Mauna Kea in Hawaii, astrophysicists began peering into the complex circumstellar shells surrounding the supergiant, causing them to suspect the presence of huge gas bubbles resulting from convection. But it was not until the late 1980s and early 1990s, when Betelgeuse became a regular target for aperture masking interferometry, that breakthroughs occurred in visible-light and infrared imaging. Pioneered by John E. Baldwin and colleagues of the Cavendish Astrophysics Group, the new technique employed a small mask with several holes in the telescope pupil plane, converting the aperture into an ad-hoc interferometric array. The technique contributed some of the most accurate measurements of Betelgeuse while revealing bright spots on the star's photosphere. These were the first optical and infrared images of a stellar disk other than the Sun, taken first from ground-based interferometers and later from higher-resolution observations of the COAST telescope. The "bright patches" or "hotspots" observed with these instruments appeared to corroborate a theory put forth by Schwarzschild decades earlier of massive convection cells dominating the stellar surface.
 Link Information: none Question: When was the technology used at Mount Wilson, Mount Locke, and Mauna Kea invented?

SOLUTION: Answer: none

PROBLEM: Passage: Following the war, Walker served on the editorial staff of the Springfield Republican before using his family and military connections to gain appointment as the Chief of the Bureau of Statistics from 1869 to 1870 and Superintendent of the 1870 census where he published an award-winning Statistical Atlas visualizing the data for the first time. He joined Yale University's Sheffield Scientific School as a professor of political economy in 1872 and rose to international prominence serving as a chief member of the 1876 Philadelphia Exposition, American representative to the 1878 International Monetary Conference, President of the American Statistical Association in 1882, and inaugural President of the American Economic Association in 1886, and vice president of the National Academy of Sciences in 1890. Walker also led the 1880 census which resulted in a twenty-two volume census, cementing Walker's reputation as the nation's preeminent statistician.
 Link Information: The 1870 Census was the first census to provide detailed information on the African-American population, only five years after the culmination of the Civil War when slaves were granted freedom. The total population was 38,925,598 with a resident population of 38,558,371 individuals, a 22.62% increase from 1860. Question: What was the total population of the 1870 census?

SOLUTION: Answer: 38,925,598

PROBLEM: Passage: Route 87 begins as Norwich-Lebanon Road at an intersection with Route 32 in the southeast corner of the town of Franklin, just northwest of the Yantic neighborhood of Norwich. It heads northwest across the Susquetonscut Brook and railroad tracks, briefly crossing into Bozrah (for 0.18 miles), before re-entering Franklin. The road runs for another in the southwest part of Franklin then enters the town of Lebanon, where the road name becomes Trumbull Highway. Route 87 heads directly into the town center where it has a junction with Route 207. About a mile further, Route 289 splits off heading north towards Willimantic while Route 87 continues northwest towards Columbia. At the Columbia town center, it intersects with Route 66. North of the town center, Route 87 skirts the north shore of Columbia Lake before crossing into the town of Andover. Route 87 ends about half a mile from the town line at an intersection with US 6. Westbound US 6 continues directly into the Andover town center.
 Link Information: Route 32 is a 54.88 mi primary north–south state highway in the U.S. state of Connecticut Question: How long is the route that Route 87 begins as an intersection with?

SOLUTION:
Answer: 54.88 mi