( ( A population ) ( ( is ( ( a group ) ( of ( individuals ( of ( ( the ( same species ) ) ( that ( occupy ( a ( given area ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN population)) (VP (VBZ is) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NP (NNS individuals)) (PP (IN of) (NP (NP (DT the) (JJ same) (NN species)) (SBAR (WHNP (WDT that)) (S (VP (VB occupy) (NP (DT a) (VBN given) (NN area))))))))))) (. .)))
A population is a group of individuals of the same species that occupy a given area.
(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))))) (. .)))