Complex sentence: In 1999 Survival International published a study of the Innu communities of Labrador and the impact of the Canadian government's policy of relocating them far from their ancestral lands and preventing their practising their ancient way of life.
Split into simpler sentences: In 1999 Survival International published a study of the Innu communities of Labrador. It assessed the impact of the Canadian government's relocating the people far from their ancestral lands and preventing their practising their ancient way of life.