You will be given a definition of a task first, then some input of the task.
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: Jacob was going inside a mall store. Sentence2: He didn't notice the wet floor sign. Sentence3: He slipped and fell down. Sentence4: This caused him to break his leg. Sentence5: He blame the store even though it was his fault obviously.
Output:
Jacob