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.
Input: Sentence1: Tim had been trying to have a child with his wife for years. Sentence2: It was with great pride that he was now holding his newborn son. Sentence3: At the hospital, Tim could not help but grin. Sentence4: The nurses and doctors noticed this as well. Sentence5: Tim left the hospital, a changed man.
Output:
Nurses, Tim, Doctors, Newborn son, Wife