As this happens the green pigmentation of leaves, chlorophyll, begins to break down unmasking the yellows and oranges that are present all year in the leaf.
(this; happens; ) (the green pigmentation of leaves, chlorophyll; begins; ) (the green pigmentation of leaves, chlorophyll; unmasking; the yellows and oranges that are present all year in the leaf) (the yellows and oranges; are; present; T:all year; L:in the leaf)
this the green pigmentation of leaves, chlorophyll the green pigmentation of leaves, chlorophyll the yellows and oranges
happens begins unmasking are
the yellows and oranges that are present all year in the leaf
present T:all year L:in the leaf