Schweitzer knew that his own food depended upon the destruction of plants and animals.
(Schweitzer; knew; that his own food depended upon the destruction of plants and animals) Context(Schweitzer knew,List([0, 15))):(his own food; depended; upon the destruction of plants and animals)
Schweitzer knew,List([0, 15))
Schweitzer his own food
knew depended
that his own food depended upon the destruction of plants and animals
upon the destruction of plants and animals