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.

Ex Input:
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.

Ex Output:
What do we know about Sleep Phones?

Ex Input:
Article: Ad. 1 April fool's party On Friday, April 1, Inner Affair goes back to the days of funk! Classic Tunes from the 70's and 80's by DJs Den & Sion. 9pm till late. Tickets: Free entrance for those in costume, otherwise 50 Yuan (US$6) Time/date: 9 pm, April 1 Place: Inner Affair, 1/F Qiankun Dasha, 6 Sanlitun Xiliujie, Chaoyang District Tel: 8454 0321 Ad. 2 Language in use Enjoy free in house coffee, tea and beer as well as music and dancing. Practice your Chinese, make friends and have fun. Time/date: 7 to 9 pm, March 25 Place: Language In Use Club, 2/F, Science Fortune Center, 8 Xueqing Lu, north of Xueyuan Lu, Haidian District Ad. 3 The "worst" party Organized by Ozone Productions, the party is set to be "the worst ever", with the lamest music from the 60s, 70s and 80s. Special prizes will be awarded to the worst dressed or for bad fashion sense. Tickets: Free entrance Time/date: 9 pm, April 1 Place: Pula Pula, Tianze Lu, Oriental Seven Colours Plaza, Chaoyang District Tel: 64668575 Ad. 4 La Nuit Francaise Again on the 2nd Thursday of the month La Nuit Francaise will be held at Le Rendezvous. The monthly event is an opportunity for all French people and everyone interested in France or speaking French to gather together. The evening features three glasses of wine and canapes for participants and a special exhibition. Time/date: 7 to 10 pm, April 14 Place: Le Rendezvous, 3 Gongti Beilu, across from the Pacific Century Plaza, Chaoyang District Tel: 64629110 Ad. 5 Marco V Dutch DJ Marco V drops by Banana for a gig which is supported by Hong Kong's DJ Spark. Marco V has been around for many years, as an inventive, style blending deejay and a successful and devoted producer. His spinning is energetic, crowd pleasing and never sees an empty dance floor. He was ranked No. 15 in this year's international DJ MAG DJ Top100. Tickets: 40 yuan (US$4.80) in advance, 50 yuan (US$6) at the door, both include a free drink Time/date: 10 pm to 4 am, March 31, April 1 Place: Banana, in the lobby of the Scitech Hotel, 22 Jianwai Dajie, Chaoyang District Tel: 65283636
Answer: Some old music will be played at the parties.

Ex Output:
Which of the following is NOT true of Ad. 1 and Ad. 3?

Ex Input:
Article: Discover the beautiful, silent, white world or Antarctica on the holidays of a life-time.Head South to Buenos Aires and then transfer to the world's most southern city, Ushuaia.From there, it's about 1,000 kilometers on a special icebreaker ship to the freezing temperature of Antarctica. Getting off the ship and taking your first step onto the ice, you will imagine what it is like to be an explorer.Meet penguins sitting on their eggs, or see an Antarctic seal that lives all the year round on the ice.But do not get closer than five meters to any animal, in case you frighten it or make it angry. The friendly crew of the ship will look after you as you explore the ice continent. We promise you fantastic meals and a comfortable bed -- you sleep in a four-person cabin -- as well as many special treats.If you don't think it is cold enough, try the ''polar plunge" -- jump into a special hole dug in the ice and dip your head under the water.You can then jump into a hot bath and if you succeed we will give you a certificate. After you wake up for the first time in the Antarctica you will understand why everybody who goes there falls in love with the place.The scenery is different every day because the sea ice is always moving. Our ships travel to Antarctica from November to March -- phone today and book your dream holiday!
Answer: Never make them angry.

Ex Output:
How should you behave when you see animals on Antarctica?