Given the task definition and input, reply with output. 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: Debbie was majoring in history at her university. Sentence2: She had to write a senior thesis on a historical event. Sentence3: She chose Bastille Day. Sentence4: She chose it almost at random. Sentence5: She grew very tired of the research but saw it through nonetheless.
Debbie