Task: Question Generation
Input (English): Passage: The film begins with a mock newsreel sequence showing the chaos around the death of 31-year-old film star Rudolph Valentino. Thousands of fans mob the funeral home until order is restored, at which point the important women in Valentino's life come to mourn. Each remembers him via flashbacks.
The first of these women Bianca de Saulles who knew Valentino when he was a  taxi dancer, and gigolo in New York City. He shares with her his dream of owning an orange grove in California.  After mobsters rob him, he decides he must make the move west.  
Next is a young movie executive and screenwriter named June Mathis, who has an unrequited love for Valentino. She first meets Valentino in California, where he upsets Mr. Fatty by grabbing the starlet next to Arbuckle and romancing her into becoming his first wife, Jean Acker. Acker's glamorous and luxurious life, made possible by acting in movies, motivates Valentino to try acting himself. Mathis recalls seeing him in a bit part in a movie and, based on that alone, recommending him for a larger role in her next project, The Four Horsemen of the Apocalypse. The hugely successful 1921 film launches Valentino to superstardom, and she is proud to have discovered him.
Back at the funeral, Alla Nazimova makes a flamboyant entrance.  She proceeds to make a scene and, when the photographers ask her to repeat it for the cameras, she obliges.  Nazimova claims a relationship with Valentino and recalls working on Camille with him.
Output (English): What is the first name of the person who is launched into superstardom with the film The Four Horsemen of the Apocalypse?