( ( Population ( ( A group ) ( of ( ( the ( same kind ) ) ( of ( organisms ( living ( in ( a ( certain place ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Population) (NP (NP (DT A) (NN group)) (PP (IN of) (NP (NP (DT the) (JJ same) (NN kind)) (PP (IN of) (NP (NP (NNS organisms)) (VP (VBG living) (PP (IN in) (NP (DT a) (JJ certain) (NN place)))))))))) (. .)))
Population A group of the same kind of organisms living in a certain place.
(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))))) (. .)))