( ( ( ( ( ( Controversial ( Diagnostic ( Techniques ( and ( ( ( ( Treatments ( Poison Ivy ) ) , ) ( Poison Oak ) ) ( , ( and ( Sumac ( Allergic reactions ) ) ) ) ) ) ) ) ) to ) ( ( ( ( three ( native ( American ( plants-poison ivy ) ) ) ) , ) ( poison oak ) ) , ) ) and ) ( ( ( poison sumac ) , ) ( ( all members ) ( of ( the plant ) ) ) ) ) ( ( genus ( Toxicodendron ( have ( ( been ( sources ( of misery ) ) ) ( for ( many centuries ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Controversial) (NNP Diagnostic) (NNPS Techniques) (CC and) (NP (NP (NNP Treatments) (NNP Poison) (NNP Ivy)) (, ,) (NP (NNP Poison) (NNP Oak))) (, ,) (CC and) (NNP Sumac) (NNP Allergic) (NNS reactions)) (TO to) (NP (NP (CD three) (JJ native) (JJ American) (JJ plants-poison) (NN ivy)) (, ,) (NP (NN poison) (NN oak)) (, ,))) (CC and) (NP (NP (NN poison) (NN sumac)) (, ,) (NP (NP (DT all) (NNS members)) (PP (IN of) (NP (DT the) (NN plant)))))) (VP (VBZ genus) (SBAR (S (NP (NNP Toxicodendron)) (VP (VBP have) (VP (VBN been) (NP (NP (NNS sources)) (PP (IN of) (NP (NN misery)))) (PP (IN for) (NP (JJ many) (NNS centuries)))))))) (. .)))
Controversial Diagnostic Techniques and Treatments Poison Ivy, Poison Oak, and Sumac Allergic reactions to three native American plants-poison ivy, poison oak, and poison sumac, all members of the plant genus Toxicodendron have been sources of misery for many centuries.
(ROOT (S (NP (NN Poison) (NN ivy)) (ADVP (RB typically)) (VP (VBZ has) (NP (NP (CD three) (NNS groups)) (PP (IN of) (NP (NNS leaves))))) (. .)))