Detailed Instructions: 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: Lasko Johnson was covered in moles. Sentence2: One day, Lasko decided he'd had enough. Sentence3: Away to the doctor he went. Sentence4: But on the way, he hit a hazmat truck. Sentence5: Now he's in a coma.
A:
Lasko johnson, Doctor