They are very important today because humans produce a lot of carbon dioxide and the trees in forests help to turn this back into oxygen which we breathe to live from.
(They; are; very important; T:today; because humans produce a lot of carbon dioxide and the trees in forests help to turn this back into oxygen) (humans; produce; a lot of carbon dioxide and the trees in forests) (we; breathe; ) Context(we breathe,List([143, 153))):(oxygen; to live; we)
we breathe,List([143, 153))
They humans we oxygen
are produce breathe to live
very important T:today because humans produce a lot of carbon dioxide and the trees in forests help to turn this back into oxygen
a lot of carbon dioxide and the trees in forests
we