Most of the oxygen molecules in the air are paired, and this is what we need to breathe.
(Most of the oxygen molecules in the air; are paired; ) (this; is; what we need to breathe) Context(this is,List([56, 63))):(we; need; to breathe) Context(this is we need,List([56, 76))):(we; need to breathe to breathe; )
this is,List([56, 63)) this is we need,List([56, 76))
Most of the oxygen molecules in the air this we we
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what we need to breathe
to breathe