Q: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Sentence1: Jack entered a golf tournament. Sentence2: He was a good golfer, and thought he had a shot at winning. Sentence3: He practiced hard to get ready. Sentence4: He entered the tournament and finished eighth. Sentence5: He wanted to have finished higher, but was happy with his performance.
A:
Jack