We're like a piece of sedimentary rock that has in it the imprint of a bird or a small animal, left behind when the rock was soft mud, but now hardened into solid rock.
(sedimentary rock; has; L:in it; the imprint of a bird or a small animal) (the rock; was; soft mud)
sedimentary rock the rock
has was
L:in it the imprint of a bird or a small animal
soft mud