Detailed 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.
Q: Sentence1: Jake was upset at his girlfriend. Sentence2: He had been upset for a while. Sentence3: He tried to talk to her about it. Sentence4: Jake's girlfriend didn't want to listen. Sentence5: Jake asked to break up.
A:
Jake, His girlfriend