"Second supporter will appear for projectile jet during the derby Saint-Étienne-Lyon"
This title is short, concise and clear. He summarized the main facts of the article: a second AS Saint-Étienne supporter would be tried for throwing an object during the match against Olympique Lyonnais. The title highlights the importance of this case using the phrase "second supporter", which suggests that there have been other similar incidents. The word "jet" is used to emphasize the seriousness of the act, while "comparera" indicates that the trial has not yet taken place. Finally, the title uses simple and common terms to facilitate its understanding by a broad audience.