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: Tim had been trying to have a child with his wife for years. Sentence2: It was with great pride that he was now holding his newborn son. Sentence3: At the hospital, Tim could not help but grin. Sentence4: The nurses and doctors noticed this as well. Sentence5: Tim left the hospital, a changed man.
Nurses, Tim, Doctors, Newborn son, Wife

Sentence1: My wife hates her job. Sentence2: She is a teacher to sixth graders and she always gets headaches. Sentence3: She complains that they are way to loud and don't listen. Sentence4: She asked the principal if she could teach at the high school level. Sentence5: The principal allowed her to switch to the junior year, she's happy.
I (myself), School, Principal, Sixth graders, Wife

Sentence1: The high schoolers were excited for Chemistry class. Sentence2: They got to work in the lab. Sentence3: They did lots of experiments involving fire. Sentence4: When class was over, they went home to study. Sentence5: They wanted to be ready for the next class!
The high schoolers