( They ( ( ( use ( the ( carbon dioxide ) ) ) ( that ( we ( ( ( ( exhale along ) ( with ( ( water and ) sunlight ) ) ) ( to ( make ( ( sugar and ) oxygen ) ) ) ) ( -LRB- ( ( this ( is photosynthesis ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP use) (NP (DT the) (NN carbon) (NN dioxide)) (SBAR (IN that) (S (NP (PRP we)) (VP (VP (VBD exhale) (PRT (RP along)) (PP (IN with) (NP (NN water) (CC and) (NN sunlight))) (S (VP (TO to) (VP (VB make) (NP (NN sugar) (CC and) (NN oxygen)))))) (PRN (-LRB- -LRB-) (S (NP (DT this)) (VP (VBZ is) (NP (NN photosynthesis)))) (-RRB- -RRB-)))))) (. .)))
They use the carbon dioxide that we exhale along with water and sunlight to make sugar and oxygen (this is photosynthesis).
(ROOT (S (S (NP (NNS Photosynthesis)) (VP (VBZ is) (VP (VBN described) (PP (IN by) (NP (DT this) (NN statement)))))) (: :) (S (NP (NP (NN carbon) (NN dioxide)) (CC and) (NP (NN water))) (VP (VBP are) (VP (VBN turned) (PP (IN into) (NP (NN sugar) (CC and) (NN oxygen)))))) (. .)))
Photosynthesis is described by this statement: carbon dioxide and water are turned into sugar and oxygen.