Complex sentence: Some members of the Rohilla migrated to Pakistan and settled in Karachi after the independence of Pakistan in 1947, forming a part of Urdu-speaking Muslims (Muhajir people) 30-35% of the larger Muhajir community of Sindh.
Split into simpler sentences: Some members of the Rohilla migrated to Pakistan and settled in Karachi after the independence of Pakistan in 1947. They form a part of Urdu-speaking Muslims (Muhajir people) 30-35% of the larger Muhajir community of Sindh.