( ( among ( other things ) ) ( , ( plants ( ( ( ( ( give off ) oxygen ) and ) ( take ( in ( ( carbon ( dioxide gas ) ) ( necessary ( for ( ( growth and ) development ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN among) (NP (JJ other) (NNS things))) (, ,) (NP (NNS plants)) (VP (VP (VB give) (PRT (RP off)) (NP (NN oxygen))) (CC and) (VP (VB take) (PP (IN in) (NP (NP (NN carbon) (NN dioxide) (NN gas)) (ADJP (JJ necessary) (PP (IN for) (NP (NN growth) (CC and) (NN development)))))))) (. .)))
among other things, plants give off oxygen and take in carbon dioxide gas necessary for growth and development.
(ROOT (S (NP (NN Oxygen) (NN gas)) (VP (VBZ is) (VP (VBN given) (PRT (RP off)) (PP (IN by) (NP (NNS plants))))) (. .)))