The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Q: story: Ultratop is an organization which generates and publishes the official record charts in Belgium, and it is also the name of most of those charts. Ultratop is a non-profit organization, created on the initiative of the Belgian Entertainment Association (BEA), the Belgian member organization of the International Federation of the Phonographic Industry. Two parallel set of charts are concurrently produced and published, one on behalf of Belgium's Dutch-speaking Flanders region, and the other catering to the nation's French-speaking region of Wallonia.

The music charts produced by Ultratop organization are separated along regional-language boundaries, an unusual division that is justified by the cultural differences in Belgium. So it is that the Dutch-speaking Flanders region has one set of charts of record activity there, while the French-speaking Wallonia region has another set to measure popularity in those provinces.

The charts are broadcast on several Belgian radio stations, and on TV stations TMF in Flanders and Plug RTL in Wallonia.

Ultratop creates charts based on record sales of around 500 retail outlets and legal digital downloads. Currently GfK is the market observer of the charts. The chart broadcasts on Radio Contact on Saturdays from 12:00 to 14:00. The combined number of Ultratop chart listeners on the various radio or TV stations exceeds two million every week. To celebrate the 10th anniversary of the charts in 2005, a jubilee book was published. It covers all 15,282 singles from 5,882 artists thus far., question: By what, in Belgium?

A: the cultural differences
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Q: story: Omaha is the largest city in the state of Nebraska and the county seat of Douglas County. Omaha is located in the Midwestern United States on the Missouri River, about north of the mouth of the Platte River. Omaha is the anchor of the Omaha-Council Bluffs metropolitan area, which includes Council Bluffs, Iowa, across the Missouri River from Omaha. According to the 2010 census, Omaha's population was 408,958, making it the nation's 44th-largest city; this had increased to 446,970 as of a 2016 estimate. Including its suburbs, Omaha formed the 60th-largest metropolitan area in the United States in 2013, with an estimated population of 895,151 residing in eight counties. The Omaha-Council Bluffs-Fremont, Nebraska-IA Combined Statistical Area is 931,667, according to the U.S. Census Bureau's 2013 estimate. Nearly 1.3 million people reside within the Greater Omaha area, comprising a 50-mile (80km) radius of Downtown Omaha, the city's center.

Omaha's pioneer period began in 1854, when the city was founded by speculators from neighboring Council Bluffs, Iowa. The city was founded along the Missouri River, and a crossing called Lone Tree Ferry earned the city its nickname, the "Gateway to the West". Omaha introduced this new West to the world in 1898, when it played host to the World's Fair, dubbed the Trans-Mississippi Exposition. During the 19th century, Omaha's central location in the United States spurred the city to become an important national transportation hub. Throughout the rest of the 19th century, the transportation and jobbing sectors were important in the city, along with its railroads and breweries. In the 20th century, the Omaha Stockyards, once the world's largest, and its meatpacking plants gained international prominence., question: Which river?

A: the Missouri River
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Q: story: CHAPTER XVIII.

_A BRICK TURNS UP_.

The snow had been all night falling silently over the long elm avenues of Springdale.

It was one of those soft, moist, dreamy snow-falls, which come down in great loose feathers, resting in magical frost-work on every tree, shrub, and plant, and seeming to bring down with it the purity and peace of upper worlds.

Grace's little cottage on Elm Street was imbosomed, as New-England cottages are apt to be, in a tangle of shrubbery, evergreens, syringas, and lilacs; which, on such occasions, become bowers of enchantment when the morning sun looks through them.

Grace came into her parlor, which was cheery with the dazzling sunshine, and, running to the window, began to examine anxiously the state of her various greeneries, pausing from time to time to look out admiringly at the wonderful snow-landscape, with its many tremulous tints of rose, lilac, and amethyst.

The only thing wanting was some one to speak to about it; and, with a half sigh, she thought of the good old times when John would come to her chamber-door in the morning, to get her out to look on scenes like this.

"Positively," she said to herself, "I must invite some one to visit me. One wants a friend to help one enjoy solitude." The stock of social life in Springdale, in fact, was running low. The Lennoxes and the Wilcoxes had gone to their Boston homes, and Rose Ferguson was visiting in New York, and Letitia found so much to do to supply her place to her father and mother, that she had less time than usual to share with Grace. Then, again, the Elm-street cottage was a walk of some considerable distance; whereas, when Grace lived at the old homestead, the Fergusons were so near as to seem only one family, and were dropping in at all hours of the day and evening. , question: what about after that?

A:
I must invite some one to visit me. One wants a friend to help one enjoy solitude
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