( ( All humans ) ( ( living today ) ( ( ( ( belong ( to ( ( ( ( a ( single species ) ) , ) ( Homo sapiens ) ) , ) ) ) and ) ( share ( a ( common descent ) ) ) ) . ) ) )
(ROOT (S (NP (DT All) (NNS humans)) (NP (JJ living) (NN today)) (VP (VP (VBP belong) (PP (TO to) (NP (NP (DT a) (JJ single) (NN species)) (, ,) (NP (NN Homo) (NNS sapiens)) (, ,)))) (CC and) (VP (VBP share) (NP (DT a) (JJ common) (NN descent)))) (. .)))
All humans living today belong to a single species, Homo sapiens, and share a common descent.
(ROOT (S (NP (NNS Humans)) (VP (VBP belong) (PP (TO to) (NP (DT the) (NN species) (NN homo) (NN sapiens)))) (. .)))