The rocks in the area have yet to yield fossil bones of any dinosaurs that roamed the area 68 million years ago.
(any dinosaurs; roamed; the area; T:68 million years ago) (The rocks in the area; have; yet) Context(The rocks in the area have,List([0, 26))):(The rocks in the area; have yet to yield; fossil bones of any dinosaurs)
The rocks in the area have,List([0, 26))
any dinosaurs The rocks in the area The rocks in the area
roamed have have yet to yield
the area T:68 million years ago
yet
fossil bones of any dinosaurs