Complex sentence: Fernando Sabino was born on October 12th, the Brazilian Children's Day, in 1923, in Belo Horizonte, Minas Gerais, where he lived until he was twenty, when he moved hanged to Rio de Janeiro.
Split into simpler sentences: Fernando Sabino was born on October 12th, the Brazilian Children's Day, in 1923. He's from Belo Horizonte, Minas Gerais, where he lived until his twenty years, so he changed to Rio de Janeiro.