Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: The group is small. No more than 40 people, celebrating mass in the middle of a dusty road on the slopes of Guerrero, Mexico's only state to be named after a former president.

Mexico missing students: Looking for Iguala mass graves