Long time periods are needed because evolution works slowly with chance and natural selection guiding structural change.
(Long time periods; are needed; because evolution works slowly with chance and natural selection guiding structural change) (evolution; works slowly; with chance and natural selection; guiding structural change) Context(evolution works slowly,List([37, 59))):(evolution; works slowly guiding; structural change)
evolution works slowly,List([37, 59))
Long time periods evolution evolution
are needed works slowly works slowly guiding
because evolution works slowly with chance and natural selection guiding structural change
with chance and natural selection guiding structural change
structural change