Complex sentence: Onge population numbers were substantially reduced in the aftermath of colonisation and settlement, from 672 in 1901 to barely 100, the surviving members are confined to two reserve camps on Little Andaman.
Split into simpler sentences: Onge population numbers were substantially reduced in the aftermath of colonisation and settlement, from 672 in 1901 to barely 100. The surviving members are confined to two reserve camps on Little Andaman.