Q: 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.
Sentence1: Austin was very depressed with his job and girlfriend lately. Sentence2: So his best friend told him about Tony Robbins Sentence3: Zach was skeptical, but decided to go see him this weekend. Sentence4: Zach loved him so much, he took 10 pages of notes! Sentence5: One month later, Zach was happy with his job and girlfriend.
A:
Zach, Tony robbins, Tony, Girlfriend, Austin, Friend