input: Make use of the article to answer the questions. (CNN) -- Dealing with Merion is turning out to be tough enough. But Tiger Woods is also battling an injury at the U.S. Open in Pennsylvania.

Woods revealed that he hurt his left arm while winning The Players Championship last month, which would explain why he grimaced noticeably on several occasions in the first round.

The world's top-ranked golfer was back in action in the second round Friday and shot a level-par 70 to complete two rounds at three-over-par 143.

Asked to provide more details about injury, Woods didn't elaborate.

"Well, it is what it is," Woods said.

Woods is bidding to win his 15th major but first since 2008 at the U.S. Open at Torrey Pines.

Back then he had to deal with seemingly a more serious injury -- a broken leg. He memorably beat Rocco Mediate in a playoff.

Given the challenging conditions at Merion, Woods suggested his total might not be so bad heading into the final two rounds.

Storms caused delays of more than four hours Thursday -- Woods had to complete his first round Friday -- and play was eventually suspended due to darkness. Windy conditions added to the degree of difficulty at Merion's shorter East Course.

Woods, Rory McIlroy and Masters winner Adam Scott made for a dream pairing and while Scott struggled, Woods and McIlroy -- the second-ranked golfer -- fared better.

Seen chatting amicably during the round, the duo compiled identical scores in the first two rounds.

Beginning at the 11th hole, Woods birdied the 13th for a good start. Two bogeys, however, on the 14th and 18th, meant he had work to do on the first nine. 1. Who is the highest ranked golfer?
2. During what championship did he injure himself?
3. What body part did he injure?
4. Which one?
5. What major is he attempting to win?
6. How many would that total in his career?
7. How long has it been since he has won one at Torrey Pines?
8. Was he injured then, too?
9. Which body part was injured back then?
10. When did storms cause delays?
11. What caused a delay on Friday?
12. On what holes did Woods score a bogey?
13. Which did he birdie?
numbered_answers: 1. Tiger Woods
2. The Players Championship
3. His arm
4. Left
5. U.S. Open
6. 15
7. Since 2008
8. Yes
9. Broken leg
10. Thursday
11. Darkness
12. 14th and 18th
13. 13th

input: Make use of the article to answer the questions. Willie Stewart still remembers his first day of kayaking through the grand Canyon. He was getting bounced around in the roughest white water he had ever seen. There was nothing the river threw at him.

There he was in a 40-pound boat, with only a few months of training and one arm. Tied to his left shoulder was a prosthetic limb that he'd had for just about a week. The plan was to paddle for 20 days over 227 miles of the roughest white water in the United States. It was one of the most remarkable adventures that the Grand Canyon had ever seen.

It started with a casual phone call in the spring of 2005. A good friend, Mike Crenshaw, finally got a permit from the National Park Service to lead a private party of 16 boaters down the Colorado River that coming August. He had a slot open for Willie, "Was he interested ?"

"It was the chance of a lifetime," Stewart said. He had been waiting years for this trip to happen. "How could I refuse ?"

But before they set off, Stewart had a couple of things to take care of. He had to get a white-water kayak, learn how to use it, and get an arm.

For most of his life, the _ 45-year-old man has lived with only his right arm. He lost his left arm in a horrible accident when he was 18.Stewart was doing a summer construction job inprefix = st1 /Washington,D.C.The trailing end of rope he was carrying got twisted in an industrial fan. Before he could react, the fan reeled in the rope tight and cut his arm just above the elbow.

He became a bitter young man, angry at the unfairness of what had happened ,and often got into fights. In time, he learned to channel his rage into sports. He joined a rugby team, established a reputation as a fearless player and eventually was elected captain. His days of rage long gone, he found peace and purpose in his life. 1. Who got a permit to lead a party of boaters down the Colorado River?
2. Who had only one arm?
3. How old was he when he lost it?
4. What kind of job was he doing at the time?
5. What got twisted in a fan?
6. Were there 15 boaters in the party going down the Colorado?
7. Where was Stewart kayaking on his first day?
8. How much did the boat weigh?
9. How many days were they supposed to paddle for?
10. Over how many miles?
11. When was the phone call about the trip made?
12. Of what year?
13. Did Stewart have anything tied over his shoulder?
14. What?
15. How long had he had it?
16. How old was he?
17. Was he mad about what happened to him?
18. How did he act out?
19. What positive thing did he learn to do with his anger?
20. What did he join?
numbered_answers:
1. Mike Crenshaw
2. Willie Stewart
3. 18
4. construction
5. rope
6. No
7. through the grand Canyon
8. 40lbs
9. 20
10. 227
11. In the Spring
12. 2005
13. Yes
14. a prosthetic limb
15. for just about a week
16. 45
17. Yes
18. often got into fights
19. to channel into sports
20. a rugby team