Complex sentence: Though the Karachi region has been inhabited for millennia, the city traces its roots to a small fishing village named "Kolachi" which was formally established as a fortified trading settlement in 1729.
Split into simpler sentences: Though the Karachi region has been inhabited for millennia, the city traces its roots to a small fishing village named "Kolachi". Karachi was formally established as a fortified trading settlement in 1729.