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: Shelia had Driver's Ed this semester. Sentence2: Shelia was not excited about it. Sentence3: The teacher was mean. Sentence4: Sheila failed the in class drivers test. Sentence5: Shelia got her license the following summer instead.
Sheila, Teacher, Shelia