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: Tina was at the beach eating a chicken sandwich. Sentence2: As soon as she bit into it, it was delicious. Sentence3: However to her dismay, a seagull came by. Sentence4: The seagull came and stole the sandwich. Sentence5: Tina was horrified that the seagull attacked her like that.
Output:
A seagull, Tina