Complex sentence: Among the many men who respond to the announcement, Adriano Alberti Luis Gerónimo Abreu who is the heir of an international chain of hotels, he is the candidate who knows or knew her.
Split into simpler sentences: Among the many men who respond to the announcement is Adriano Alberti (Luis Gerónimo Abreu) who is the heir of an international chain of hotels. He is the candidate who knows or knew her.