Floodplains, which historically provided rich farmlands, owe their soil fertility to flooding rivers, which deposit minerals and nutrients carried from their mountain origins.
(flooding rivers; carried; from their mountain origins) (Floodplains, which historically provided rich farmlands; owe; their soil fertility; to flooding rivers) Context(Floodplains , which historically provided rich farmlands owe,List([0, 60))):(Floodplains; provided; rich farmlands; T:historically)
Floodplains , which historically provided rich farmlands owe,List([0, 60))
flooding rivers Floodplains, which historically provided rich farmlands Floodplains
carried owe provided
from their mountain origins
their soil fertility to flooding rivers
rich farmlands T:historically