As rocks erode by chemical and physical weathering, they begin to breakdown into smaller pieces of rock and minerals.
(rocks; erode; ) (they; begin; to breakdown into smaller pieces of rock and minerals) Context(they begin,List([52, 62))):(they; begin to breakdown; into smaller pieces of rock and minerals)
they begin,List([52, 62))
rocks they they
erode begin begin to breakdown
to breakdown into smaller pieces of rock and minerals
into smaller pieces of rock and minerals