Complex sentence: The winner of the pageant was Stefanía Fernández, Miss Trujillo who would later become Miss Universe 2009 on October 23,2009, thus marking the first time in the history of the pageant that an outgoing titleholder has crowned a Miss Universe from her same country.
Split into simpler sentences: The winner of the pageant was Stefanía Fernández, Miss Trujillo who would go on to become Miss Universe 2009 on October 23,2009. This marks the first time in the history of the Miss Universe pageant that an outgoing titleholder has crowned a Miss Universe from her same country.