Complex sentence: DJ Kool Herc arrived in the United States at the age of 12, according to him breakbeats were created out of his understanding or belief that the bass and the drum were the elements of music that moved people to dance.
Split into simpler sentences: DJ Kool Herc arrived in the United States at the age of 12. According to him breakbeats were created out of his understanding or belief that the bass and the drum were the elements of music that moved people to dance.