Question: Seoul, South Korea (CNN) -- Korean is considered one of the hardest languages in the world to master, but an elephant in a South Korean zoo is making a good start.

Koshik, a 22-year-old Asian elephant has stunned experts and his keepers at Everland Zoo near Seoul by imitating human speech. Koshik can say the Korean words for "hello," "sit down," "no," "lie down" and "good." His trainer, Kim Jong Gap, first started to realize Koshik was mimicking him several years ago.

""In 2004 and 2005, Kim didn't even know that the human voice he heard at the zoo was actually from Koshik," zoo spokesman In Kim In Cherl said. "But in 2006, he started to realize that Koshik had been imitating his voice and mentioned it to his boss."

Why do elephants have hair on their heads?

His boss initially called him "crazy."

Koshik's remarkable antics grabbed the interest of an elephant vocalization expert thousands of kilometers away at the University of Vienna in Austria.

""There was a YouTube video about Koshik vocalizing, and I was not sure if it was a fake, or if it was real," Dr. Angela Stoeger-Horwath said. She traveled with fellow expert Dr. Daniel Mietchen to South Korea in 2010 to test the elephant's ability. They recorded Koshik repeating certain words his keeper said and then played them for native Korean speakers to see, if they were recognizable.

"It is, for some of the sounds he makes, quite astonishing for how similar they are," said Mietchen of the University of Jena in Germany. "For instance the word 'choa' (meaning good) -- if you hear it right after what the keeper says -- it's quite similar." 1. What is one of the hardest languages to master?
2. Who is learning it?
3. Where?
4. Which one?
5. Which is where?
6. What is the elephant's name?
7. How old is he?
8. When did he start?
9. Who saw a video about him?
10. What is she?
11. where does she work?
12. What did she do?
13. Did she go alone?
14. Who went with her?
15. When?
16. What did they do when they got there?
17. Was he actually speaking?
18. What was he doing?
19. What was his name?
20. How was the video found? Provide a numbered list of answers.
****
A numbered of answers: 1. Korean
2. an elephant
3. in a zoo
4. Everland Zoo
5. Seoul
6. Koshik
7. 22
8. unknown
9. Dr. Angela Stoeger-Horwath
10. an elephant vocalization expert
11. at the University of Vienna
12. traveled to South Korea
13. no
14. Dr. Daniel Mietchen
15. 2010
16. recorded Koshik
17. no
18. mimicking the trainer
19. Kim Jong Gap
20. on YouTube

Q: Twenty years are just a blink in time. But 20 years is also long enough for a man to grow up. It is always painful. For Andre Agassi, maturing in the spotlight of international tennis competition was even harder.

On September 3, the American tennis player said a tearful goodbye to his 21-year career after a third-round defeat in the US Open. The 36-year-old tried his best, but was unable to keep up with German Benjamin Becker, _ years his _

"The scoreboard said I lost today, but what the scoreboard doesn't say is what I've found," Agassi said to the fans. "I have found inspiration and you willed me to succeed." It was an emotional speech at the end of a long career.

Agassi hated tennis as a teenager as much as he loves it now. His father made him play when he was a child. He got bored, and became a rebel . The strict training that his father pushed upon him got in the way of his wild lifestyle. He grew hair long, wore colourful clothes and spat at a judge. Over the years, he has made bad jokes during news conferences Asked what he would say to his 17-year-old self, Agassi answered, "I would say, I understand you a lot more than I want to be you."

The turning point in Agassi's career came in 1992 when he unexpectedly won his first Grand Slam at Wimbledon. It was the first time Agassi understood what real champions finally understand: winning is a test of courage and not just power, it's a marathon, not a sprint .

And what a marathon Agassi was about to begin. He cut his long hair, got fitter and tightened up emotionally. On the court, he was ranked No. 1 for almost two years. His lowest point came in 1997 when his ranking dropped to No. 141. He didn't quit though. "I knew that I would try to get the most out of myself every day from that day forward. That was my promise," he said. "That never stopped."

1. Andre Agassi.
2. No.
3. Almost two years.
4. 21 years.
5. 36.
6. 1992.
7. 1997.
8. His ranking dropped.
9. 141.
10. September 3.

Numbered questions:
1. Who's the subject of the article?
2. Did he always love tennis?
3. How many years was he at the number 1 rank?
4. How many years did he play professionally?
5. How old was he at the time?
6. When did he win his first at Wimbledon?
7. When was his lowest point?
8. Why was it low?
9. To what?
10. What day did he retire?

input: Beloved teacher Michael Landsberry, a former Marine, died a hero at Sparks Middle School in Nevada on Monday in another tragic campus shooting.

The 45-year-old was killed while trying to talk to the unidentified 12-year-old gunman, who later killed himself.

"He was telling him to stop and put the gun down," student Jose Cazares told Today on Tuesday. "Then the kid, he yelled out, 'No!' Like, he was yelling at him, and he shot him. The teacher was calm, he was holding out his hand like, 'Put the gun in my hand.' "

Students, parents and fellow teachers are calling Landsberry's actions heroic. Tom Robinson, vice chief with the Reno Police Department, also praised him, saying, "In my estimation, he is a hero. We do know he was trying to intervene (,)."

Landsberry, who went by the nickname Batman, and coached sports teams at the middle school and neighboring high school, was remembered fondly on social media by many students.

"It's just so sad knowing he left because he protected his students," one of the posts said, followed by another that read, "The sad part is this week it's his and his wife's anniversary and his daughter graduates from the military tomorrow."

CNN reports that two students who were wounded by the shooter - who used a Ruger 9 mm semi-automatic handgun - are currently in stable condition in hospital.

Authorities will not be releasing the identity of the shooter out of respect for his parents, but schoolmate Amaya Newton was shocked by his actions, calling the gunman "a really nice kid," adding, "He would make you smile when you were having a bad day."

"Everybody wants to know why the shooter opened fire," Sparks vice chief Tom Miller said at a news conference. "That's the big question. The answer is we don't know right now, but we are trying to determine why." 1. How did Michael Die?
2. Howso?
3. Where was this?
4. Was a student the shooter?
5. What kind of gun did he have?
6. What was he doing when he was killed?
7. Intervine how?
8. Was anyone else killed?
9. Was there a known motive?
10. How old was Michael?
11. Did he work at the school?
12. Doing what? Return numbered answers in your output.

output:
1. He died a hero .
2. He was killed while trying to talk to the gunman.,
3. Sparks Middle School.
4. Yes.
5. Ruger 9 mm semi-automatic handgun.
6. Trying to intervene.
7. Telling him to stop and put the gun down.
8. No.
9. No.
10. 45.
11. Yes.
12. Coached sports teams.