By the seventeenth century, some naturalists were beginning to believe that life on Earth had been around a very long time, and that fossils were the preserved remains of that life.
(some naturalists; were beginning; T:By the seventeenth century) (fossils; were; the preserved remains of that life) (some naturalists; to believe; that life on Earth had been around a very long time, and that fossils were the preserved remains of that life) Context(some naturalists to believe,List([28, 70))):(life on Earth; had been; around a very long time)
some naturalists to believe,List([28, 70))
some naturalists fossils some naturalists life on Earth
were beginning were to believe had been
T:By the seventeenth century
the preserved remains of that life
that life on Earth had been around a very long time, and that fossils were the preserved remains of that life
around a very long time