Complex sentence: By the age of six, Ali had begun her acting career, as a regular child performer on "Sesame Street" starting in 1985, even appearing with Herbie Hancock in a musical number.
Split into simpler sentences: By the age of six, Ali had begun her acting career. She was a regular child performer on "Sesame Street" starting in 1985, even appearing with Herbie Hancock in a musical number.