( ( Homo sapiens ) ( ( ( ( is ( ( a ( worldwide species ) ) ( with ( some ( ( 6 billion ) ( highly ( varying members ) ) ) ) ) ) ) , ) ( all ( descending ( from ( ( a ( ( small ancestral ) population ) ) ( that ( ( lived ( in Africa ) ) ( ( ( some 200,000 ) years ) ago ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Homo) (NNS sapiens)) (VP (VBZ is) (NP (NP (DT a) (JJ worldwide) (NN species)) (PP (IN with) (NP (DT some) (QP (CD 6) (CD billion)) (RB highly) (JJ varying) (NNS members)))) (, ,) (S (RB all) (VP (VBG descending) (PP (IN from) (NP (NP (DT a) (ADJP (JJ small) (JJ ancestral)) (NN population)) (SBAR (WHNP (WDT that)) (S (VP (VBD lived) (PP (IN in) (NP (NNP Africa))) (ADVP (NP (QP (DT some) (CD 200,000)) (NNS years)) (RB ago)))))))))) (. .)))
Homo sapiens is a worldwide species with some 6 billion highly varying members, all descending from a small ancestral population that lived in Africa some 200,000 years ago.
(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))) (. .)))