Complex sentence: The Biate people are believed to have migrated from Southeast China many centuries ago and were the first to settle in present-day Mizoram, from where they were pushed by later immigrants further north to other parts of North Eastern India.
Split into simpler sentences: The Biate people are believed to have migrated from Southeast China many centuries ago. They were the first to settle in present-day Mizoram, from where they were pushed by later immigrants further north to other parts of North Eastern India.