Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Charles was a very serious man and didn't laugh a lot. Sentence 2: His friends tried to tell jokes but he remained untouched. Sentence 3: To make him lose his composure, his friends decided to trick him. Sentence 4: They invited him to a conference which was in a fact a clown party. Sentence 5: Charles wasn't happy, but a smile turned the corner of his lips.

Seriousness