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: Marilou Danley, the girlfriend of gunman Stephen Paddock, has become the focus of attention in the US investigation into the Las Vegas mass shooting.

Las Vegas shooting: What do we know about Marilou Danley?