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.
Input: Sentence1: It was valentine's day when someone gave me flowers. Sentence2: Is was on top of my table and i don't know from whom is was. Sentence3: I found a card inside the bouquet. Sentence4: It says there that we will meet in front of the school fountain. Sentence5: When i saw him i noticed he is my neighbor and childhood friend.
Output:
I (myself), Someone