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.
Q: Sentence1: On my way to college one morning, I was backed up in traffic. Sentence2: There were several cars in front of me for about an hour. Sentence3: I didn't know what was going on, until I saw police officers. Sentence4: They informed us that there had been a school shooting nearby. Sentence5: I sat in my car and cried with worry about my cousin, but he was ok.
A:
I (myself), My cousin, Police officers