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: There was a war in the kingdom. Sentence2: A rival kingdom wanted to take the king's land. Sentence3: The king sent many troops into the war. Sentence4: The king and his people rose above the evil forces. Sentence5: The king and his army was victorious in their defense.
Output:
King, Army, Troops, People