input: When NASA astronaut Scott Kelly completes his yearlong mission on the International Space Station next year, he'll come back just a little bit younger than his twin, Mark, than he was before. This is because time travels more slowly in space, a phenomenon first described by Albert Einstein's 1915 theory of general relativity.

This December, universities and academies around the world are celebrating the 100th anniversary of the theory's publication.

Even 60 years after his death, Einstein is still the most important scientist of the modern era. Looking back as far as 2,400 years ago, only Newton, Galileo and Aristotle were his equals.

Born in the era of horse-drawn carriages, his ideas started a technological revolution that brought about more change in one century than in the 2,000 years before.

In 1905, Einstein published four important scientific papers. These completely changed people's ideas about space, time, light and matter. In one of these papers Einstein. introduced his theory of special relativity. Two groundbreaking parts of the theory were about the relationship between mass and energy and the speed of light. Einstein was able to show that mass and energy were connected through the formula E=MC2. The theory also says that no object can travel faster than the speed of light.

About 10 years later came his theory of general relativity, the theory that modern physics is really based on. In Einstein's mathematics, space has three dimensions, and the fourth dimension is time. Space and time are part of one continuum, called space-time. The presence of mass changes space-time, which explains where gravity comes from.

Computers, satellites, telecommunication, lasers, television and nuclear power, many of the biggest developments in the modern world, can be linked to Einstein's work.

"We are a different people than we were a century ago," said astrophysicist Michael Shara of the American Museum of Natural. History, "completely different, because of Einstein."

However, there's more to him beyond the image of a science mastermind. Einstein, as a person, has also become a grandfatherly icon in our culture.

He liked playing Mozart on his Violin and keeping fit by hiking and walking. Power was not his goal. In 1952, the young nation of Israel asked Einstein to be its president, but he refused.

And, yes, he was eccentric. With hair like that, how could he not be? 1. Scott Kelly is what?
2. Does time travel more quickly in space?
3. What year did Einstein introduce the theory of relativity?
4. Even after death, Einstein is considered to be what?
5. Who were the only two people considered to be his equals?
6. He was born in the era of what?
7. His scientific papers completely changed people's ideas about what?
8. What formula did he come up with?
9. No object can travel faster than what?
10. Modern technology can be linked to what? Return numbered answers in your output.

output: 1. an astronaut
2. no
3. 1915
4. the most important scientist the era
5. Newton, Gailieo and Aristotle
6. horse-drawn carriages
7. time, light and matter.
8. E=MC2
9. the speed of light.
10. Einstein's work.

input: (CNN) -- Serbia will face France in the final of the Davis Cup after a tense 3-2 semifinal victory over the Czech Republic in front of a passionate home support in Belgrade.

The Czechs led 2-1 after winning Saturday's doubles rubber, meaning the hosts had to claim victory in both reverse singles to secure their first-ever appearance in the final.

World number two Novak Djokovic, who missed Friday's opening singles with a stomach complaint, drew the two nations level at 2-2 when he recovered from the loss of the opening set to defeat Czech No.1 Tomas Berdych 4-6 6-3 6-2 6-4.

It completed a miserable weekend for Wimbledon finalist Berdych, who lost both of his singles rubbers.

That result means Janko Tipsarevic had to defeat the previously unbeaten Radek Stepanek to seal Serbia's final place and he did just that, winning 6-0 7-6 6-4 to send the 15,000 home supporters into raptures.

There was less drama in the other semifinal, where France completed their domination over Argentina with a 5-0 whitewash victory in Lyon.

The French led 3-0 going into the final day, meaning nothing rested on the results of the reverse singles rubbers.

However, Gilles Simon's 7-6 6-7 6-3 defeat of Eduardo Schwank meant the whitewash became a possibility -- and it was completed when Arnaud Clement beat Horacio Zeballos 7-5 6-1.

The victory ensures France, who dumped out holders Spain in the previous round, reached their first Davis Cup final since 2002.

1. Who will face off in the Davis Cup final?
2. Who did France beat to get there?
3. When was the last time they were in the final? Return numbered answers in your output.

output: 1. Serbia will face France
2. Czech Republic
3. Never

input: When Christie Andrews was born, she weighed less that half of one kilogram. Her heart was the size of a large coin. Her mother said Christie was so small that she could hold her in the palm of one hand. Christie couldn't breathe without a machine to give her oxygen. If she had been born 20 years earlier, she would probably have died at once. She needed two operations, but she survived without serious damage. Twenty years ago , 90% of all premature babies died. Today, doctors manage to save four out of every five, because they have better machines for breathing and better ways to feed the babies. But saving Christie's life cost more than $ 400,000. In some cases, doctors spend 1 million dollars saving a single child. The parents usually don't have enough money to pay. The government, an insurance company or the hospital picks up the bill. Even after a baby goes home from the hospital, it may require medical care. Some people think it makes more sense to spend money saving 10 adults who have cancer or other diseases than saving one small baby. But nobody wants to be the doctor who has to tell parents to their faces, "Sorry, I won't save your new child." 1. Do hospitals spend a lot of money saving babies?
2. How much?
3. Does everyone agree with this practice?
4. Why?
5. Who does the story talk about?
6. How much did she weigh?
7. How much was spent to save her?
8. How many surgeries did she have?
9. What kind of machine did she need?
10. How many babies died 20 years ago? Return numbered answers in your output.

output:
1. Yes.
2. 1 million dollars
3. No
4. it makes more sense to spend money saving adults
5. Christie Andrews
6. less than half of one kilogram
7. more than $ 400,000
8. two
9. oxygen
10. 90%