In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: Suppose that we lined up our roughly 14 million United States businesses in order of size, starting with the smallest, along an imaginary road from San Francisco to New York. There will be 4,500 businesses to the mile, or a little less than one per foot. Suppose further that we planted a flag each business. The height of the flag pole represents the yearly volume of sales , each $ 10, 000 in sales in shown by one foot of pole. The line of flagpoles is a very interesting sight. From San Francisco to about Reno, it is almost unnoticeable, a row of poles about a foot high. From Reno eastward the poles increase in height until, near Columbus, Ohio - about four - fifths of the way across the nation - flags fly about 10 feet in the air. But as we approach the eastern terminus , the poles suddenly begin to mount . There are about 300, 000 firms in the country with sales over $ 500, 000. These firms take up the last 75 miles of the 3,000 - mile road. There are 200, 000 firms with sales over $ 1 million. They take up the last 50 miles. Then there are 1, 000 firms with sales of $ 50, 000, 000 or more. They take up the last quarter of a mile before the city limits, flags flying at cloud height, 5 , 000 feet up . At the very gate of New York, on the last 100 feet of the last mile , we find the 100 largest industrial firms . They have sales of at least $ 1.5 billion, so that their flags are already miles high. Along the last 10 feet of road , there are 10 largest companies . Their sales are roughly $ 10 billion and up : their flags fly 190 miles in the air , almost in the stratosphere .
Answer: To tell us how the United States businesses are arranged.
What is the author's main purpose in this passage?

Article: There are a lot of products out there that make your life easier. Some, however, are a little sillier than others -- so much that they seem like joke products. Here are a few products that sound crazy, but actually rule. Sleep Phones It's hard to imagine something sillier than a music-playing headband you wear while you sleep, but they exist -- and are quite popular. Sleep Phones won't give you the highest quality sound in the world, but if you prefer to fall asleep to music, they're far more comfortable than normal headphones. While they're a bit expensive, they might be perfect for you. There's also a wireless version if you prefer. Onion Goggles If cutting onion _ no matter what you try, it's time for desperate measures. We tested a bunch of methods for avoiding onion tears, and found the best solutions came down to cutting the onion under a vent , or wearing these stylish and awesome goggles. Lock Laces There're some great ways to tie your shoes better, but if you long for the laceless shoes of your childhood days, Lock Laces are a pretty good choice. They're basically elastic laces that remove the need to tie your shoes. Sure, people will make fun of you, but you can make fun of them after they trip over their own untied laces. Or you can make your own slip-on shoes with elastic tubing. 2D-Glasses Hate 3D-movies, but have to go to one? The difference between 2D-glasses and 3D-glasses lies in their lenses . Each lens of 2D-glasses blocks the same picture, so each eye gets the same picture, while each lens of 3D-glasses blocks a different picture, so each eye gets a different picture which the brain interprets as 3D. Now you have a pair of glasses that can save you from the headache caused by wearing 3D-glasses which are popular in our movie theaters. You can buy them or make a pair for yourself.
Answer: There are two versions.
What do we know about Sleep Phones?

Article: Great Yarmouth is an English seaside town situated at the mouth of the River Yare, about 120 miles to the northeast of London. Around 5 million people visit Great Yarmouth every year, making it one of Britain's most popular seaside resorts. Formerly the home of one of the most profitable fishing industries, Great Yarmouth is a busy and very popular seaside resort. Undoubtedly, one of the most popular attractions is Great Yarmouth Pleasure Beach, a historic free entry pleasure park, which draws annually 1.5 million visitors. The two piers , Britannia Pier and Wellington Pier, both contain family-orientated entertainment. As well as the usual thrills one would expect on a classic British seafront, Great Yarmouth also has a quieter side, with a fascinating heritage quarter to explore. Not many people know that Great Yarmouth has the most complete city walls after York, with heritage walks to help you discover this medieval attraction along with several museums and houses dating back to many centuries. If ghost walks are more your cup of tea, Eerie Tales and Yarmouth Yarns is the tour for you. Great Yarmouth is also a centre for the North Sea oil and gas industry and increasingly for offshore wind power. The Great Yarmouth Outer Harbour is a huge development currently taking place which can see larger ships coming to the town. The Great Yarmouth Maritime Festival in September each year celebrates Great Yarmouth's maritime heritage. Over the past few years, Great Yarmouth has seen significant construction spending to improve and modernize the popular seafront area and to ensure it is linked to the town centre. Regent Road has a brilliant ceiling of light which is lit up in the evenings and is now a lovely street leading from the town centre to the seafront area.
Answer: The visitors must love peace.
What can we infer about the tour of the heritage area?