( ( ( The condition ) ( of ( ( a species ) ( that ( has ( ( formed ( a ( self-sustaining ( , ( free-living population ) ) ) ) ) ( at ( a ( given location ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN condition)) (PP (IN of) (NP (NP (DT a) (NN species)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (VP (VBN formed) (NP (DT a) (JJ self-sustaining) (, ,) (JJ free-living) (NN population)) (PP (IN at) (NP (DT a) (VBN given) (NN location))))))))) (. .)))
The condition of a species that has formed a self-sustaining, free-living population at a given location.
(ROOT (S (NP (NP (DT All) (NNS members)) (PP (IN of) (NP (DT a) (NN species) (NN living)))) (ADVP (RB together)) (VP (VB form) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN population))) (. .)))