( ( niche ( Struggles ( According ( to ( ( ( ( Gause 's ) ( competitive ( exclusion principle ) ) ) , ) ( in ( a ( given community ) ) ) ) ) ) ) ) ( , ( ( two species ) ( ( ( ( can not ) simultaneously ) ( occupy ( ( ( the ( same ecological ) ) ... ) 3 ) ) ) . ) ) ) )
(ROOT (S (S (NP (NN niche)) (VP (VBZ Struggles) (PP (VBG According) (PP (TO to) (NP (NP (NP (NNP Gause) (POS 's)) (JJ competitive) (NN exclusion) (NN principle)) (, ,) (PP (IN in) (NP (DT a) (VBN given) (NN community)))))))) (, ,) (NP (CD two) (NNS species)) (VP (MD can) (RB not) (ADVP (RB simultaneously)) (VP (VB occupy) (NP (NP (DT the) (JJ same) (NN ecological)) (: ...) (NP (CD 3))))) (. .)))
niche Struggles According to Gause's competitive exclusion principle, in a given community, two species cannot simultaneously occupy the same ecological ... 3.
(ROOT (S (NP (JJ Competive) (NN exclusion) (NN princple)) (VP (VBZ explains) (SBAR (WHADVP (WRB why)) (S (NP (CD two) (JJ different) (NNS species)) (VP (MD can) (RB not) (VP (VB occupy) (NP (NP (DT the) (JJ same) (NN niche)) (PP (IN in) (NP (DT the) (JJ same) (NN place)))) (PP (IN for) (ADJP (RB very) (JJ long)))))))) (. .)))