Instructions: 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: Joe had a girlfriend he loved very much. Sentence2: They had both finished college and had big plans. Sentence3: One morning, Joe decided he wanted to travel. Sentence4: He talked with his girlfriend, but she wanted a family. Sentence5: Joe gave up on all of his dreams of travel to raise children.
Output:
Girlfriend, Joe, Children