( ( ( The ( greatest concentration ) ) ( of species ) ) ( ( is ( ( ( ( in ( the tropics ) ) , ) and ) ( in ( particular ( the ( Amazon Basin ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJS greatest) (NN concentration)) (PP (IN of) (NP (NNS species)))) (VP (VBZ is) (PP (PP (IN in) (NP (DT the) (NNS tropics))) (, ,) (CC and) (PP (IN in) (S (VP (VBG particular) (NP (DT the) (NNP Amazon) (NNP Basin))))))) (. .)))
The greatest concentration of species is in the tropics, and in particular the Amazon Basin.
(ROOT (S (NP (NP (DT Some)) (PP (IN of) (NP (NP (DT the) (JJS greatest) (NNS concentrations)) (PP (IN of) (NP (NNS species)))))) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (DT the) (NNS tropics))))) (. .)))