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.

[EX Q]: Sentence1: Zack was always worried about getting sick. Sentence2: And he became so worried about the air that he wore a respirator. Sentence3: He wore it during his entire school day. Sentence4: And he told other students that the air quality was terrible. Sentence5: Zack still ended up getting sick and worried much more.
[EX A]: Other students, Zack

[EX Q]: Sentence1: Billy needed to make some money. Sentence2: He decided on Friday night he would work from home. Sentence3: Turning his computer on he realized there was a lot of work up! Sentence4: It didn't take him long to get into the swing of things. Sentence5: Before he knew it, he was working his butt off and making money.
[EX A]: Billy

[EX Q]: Sentence1: Desmond had been following the forecast in the news. Sentence2: There was a strong hurricane building on the coast. Sentence3: Desmond had prepared his home and stocked up with emergency supplies. Sentence4: The hurricane weakened and became a mild storm. Sentence5: Desmond did not need to use his emergency plan or supplies.
[EX A]:
Desmond