The Book of Worms turned out to be a large section of rock filled with fossilized worm tracks.
(The Book of Worms; turned out; ) (The Book of Worms; to be; a large section of rock filled with fossilized worm tracks) (a large section of rock; filled; with fossilized worm tracks)
The Book of Worms The Book of Worms a large section of rock
turned out to be filled
a large section of rock filled with fossilized worm tracks
with fossilized worm tracks