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: Tim had a problem. Sentence2: The planes that took off near his house scared him. Sentence3: The sound was very loud. Sentence4: His mother took him to see what the planes looked like. Sentence5: He was so amazed at the sight that he was no longer scared.
A:
Tim, Mother