Complex sentence: Olesya Rulin (born March 17,1986) is a Russian-American actress and singer who is perhaps best known for co-starring in the first three films of the "High School Musical" franchise as Kelsi Nielsen.
Split into simpler sentences: Olesya Rulin (born March 17,1986) is a Russian-American actress. She is best known for co-starring in the first three films of the "High School Musical" franchise as Kelsi Nielsen.