Complex sentence: Chelsie Kay Hightower (born July 21,1989) is a ballroom dancer, who is best known for being a regular dance partner, trainer and choreographer on the ABC competition show "Dancing with the Stars".
Split into simpler sentences: Chelsie Kay Hightower (born July 21,1989) is a ballroom dancer. She is known for being a regular dance partner, trainer and choreographer on the ABC competition show "Dancing with the Stars".