Complex sentence: He was born in Chang'an, and his families was originally from India, according to a tomb stele uncovered in 1977 in Xi'an, the Gautama families had probably settled in China for over generations, and might had predate even before the establishment of Tang.
Split into simpler sentences: He was born in Chang'an, and his families was originally from India, according to a tomb stele uncovered in 1977 in Xi'an. The Gautama families had probably settled in China over many generations, and might had predate even before the establishment of Tang.