Complex sentence: Born in 1969, Millan spent his childhood in the city of Culiacan in the state of Sinaloa, Mexico, however his favourite place was his grandfather's ranch where he was captivated by the wild dogs on the property.
Split into simpler sentences: Born in 1969, Millan spent his childhood in the city of Culiacan in the state of Sinaloa, Mexico. However his favourite place was his grandfather's ranch where he was captivated by the wild dogs on the property.