Tracking obsidian from Yellowstone to the Midwest indicates that the quality of obsidian found here was very good.
(obsidian; found; L:here) (Tracking obsidian from Yellowstone to the Midwest; indicates; that the quality of obsidian found here was very good) Context(Tracking obsidian from Yellowstone to the Midwest indicates,List([0, 59))):(the quality of obsidian; was; very good)
Tracking obsidian from Yellowstone to the Midwest indicates,List([0, 59))
obsidian Tracking obsidian from Yellowstone to the Midwest the quality of obsidian
found indicates was
L:here
that the quality of obsidian found here was very good
very good