Complex sentence: One night, Sophie sees a large, cloaked person blowing something via a trumpet-like object into a bedroom window down the street, then gets discovered by the mysterious person and carries her to his homeland of Giant Country.
Split into simpler sentences: One night, Sophie sees a large, cloaked person blowing something via a trumpet-like object into a bedroom window down the street. She is discovered by the mysterious person, who carries her to his homeland of Giant Country.