( Antibodies ( ( ( are ( natural ( defense proteins ) ) ) ( that ( organisms ( use ( to ( ( ( recognize and ) disable ) ( harmful proteins ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Antibodies)) (VP (VBP are) (NP (JJ natural) (NN defense) (NNS proteins)) (SBAR (IN that) (S (NP (NNS organisms)) (VP (VBP use) (S (VP (TO to) (VP (VB recognize) (CC and) (VB disable) (NP (JJ harmful) (NNS proteins))))))))) (. .)))
Antibodies are natural defense proteins that organisms use to recognize and disable harmful proteins.
(ROOT (S (NP (NNS Antibodies)) (VP (VBP recognize) (CC and) (VBP combine) (PP (IN with) (NP (JJ harmful) (NNS materials))) (, ,) (PP (VBG including) (NP (NP (DT both) (JJ toxic) (NNS chemicals)) (CC and) (NP (JJ invasive) (NNS microorganisms))))) (. .)))