( ( A population ) ( ( is ( ( a group ) ( of ( organisms ( of ( ( the ( same ( species living ) ) ) ( is ( a ( particular space ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN population)) (VP (VBZ is) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NP (NNS organisms)) (PP (IN of) (NP (NP (DT the) (JJ same) (NN species) (NN living)) (SBAR (S (VP (VBZ is) (NP (DT a) (JJ particular) (NN space))))))))))) (. .)))
A population is a group of organisms of the same species living is a particular space.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NP (NNS organisms)) (PP (IN of) (NP (DT the) (JJ same) (NN species)))))) (SBAR (IN that) (S (VP (VBP live) (PP (IN in) (NP (DT the) (JJ same) (NN area)))) (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN population))))) (. .)))