( ( ( ( TN ( Concept F ) ) : ) ( Populations ( interact ( to ( form ( ( a ( dynamic community ) ) ( of ( ( living organisms ) ( within ( the ecosystem ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP TN) (NNP Concept) (NNP F)) (: :) (NP (NP (NNP Populations)) (VP (VBN interact) (S (VP (TO to) (VP (VB form) (NP (NP (DT a) (JJ dynamic) (NN community)) (PP (IN of) (NP (NP (VBG living) (NNS organisms)) (PP (IN within) (NP (DT the) (NN ecosystem))))))))))) (. .)))
TN Concept F: Populations interact to form a dynamic community of living organisms within the ecosystem.
(ROOT (S (NP (NP (NNS Populations)) (VP (VBG living) (PP (IN in) (NP (CD one) (NN place))))) (VP (VBP form) (NP (DT a) (NN community))) (. .)))