Detailed Instructions: 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.
Problem:Sentence1: Mark had waited weeks to play golf. Sentence2: He got an afternoon free from work. Sentence3: He quickly headed to the golf course. Sentence4: The golf course was not busy and he got a tee time with no problem. Sentence5: Mark played 18 holes on uninterrupted golf.
Solution:
Mark