Humans inhale oxygen, which is what plants excrete, and then the human excretes carbon dioxide, which the plants take in. A.
(Humans; inhale; oxygen, which is what plants excrete) (the plants; take in; A.) (oxygen; is; what plants excrete) Context(oxygen is,List([14, 30))):(plants; excrete; )
oxygen is,List([14, 30))
Humans the plants oxygen plants
inhale take in is excrete
oxygen, which is what plants excrete
A.
what plants excrete