TASK DEFINITION: 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 and Jim went out fishing so they could have something for dinner. Sentence2: The two worked hard but it was hot and there were no fish. Sentence3: Jim suggested trying a new spot in the shade. Sentence4: The new spot worked and they brought in half a dozen fish. Sentence5: That night they had a delicious meal they were proud of.

SOLUTION: Jim, Mark

PROBLEM: Sentence1: I was feeling really sick. Sentence2: We were lined up for the bathroom. Sentence3: I sat on the floor. Sentence4: The teacher told me to go to her. Sentence5: I walked up to her and vomited on her feet.

SOLUTION: I (myself), Teacher

PROBLEM: Sentence1: I decided to visit our school when i was in high school. Sentence2: I texted my friend if she want to come with me. Sentence3: Then she agreed. Sentence4: When we were in our school,we saw some of our friends. Sentence5: Then we scheduled our next visit with our friends.

SOLUTION:
I (myself), Friends, Friend