The answer, Kathy, is that living fossils are creatures that are really good at surviving changes on Earth.
(creatures; are; really good at surviving changes on Earth) (The answer; is; that living fossils are creatures) Context(The answer is,List([0, 21))):(living fossils; are; creatures that are really good at surviving changes on Earth)
The answer is,List([0, 21))
creatures The answer living fossils
are is are
really good at surviving changes on Earth
that living fossils are creatures
creatures that are really good at surviving changes on Earth