( ( ( ( Evolution ( through ( natural ( selection deals ) ) ) ) ( with ( ( the changes ) ( of organisms ) ) ) ) ( through time ) ) . )
(ROOT (S (VP (VBN Evolution) (PP (IN through) (NP (JJ natural) (NN selection) (NNS deals))) (PP (IN with) (NP (NP (DT the) (NNS changes)) (PP (IN of) (NP (NNS organisms))))) (PP (IN through) (NP (NN time)))) (. .)))
Evolution through natural selection deals with the changes of organisms through time.
(ROOT (S (NP (NP (NNP Theevolution)) (PP (IN by) (NP (JJ natural) (NN selection) (NN theory)))) (VP (VBZ explains) (SBAR (WHADVP (WRB how)) (S (NP (NP (NNS populations)) (PP (IN of) (NP (NNS organisms)))) (VP (MD can) (VP (VB change) (PP (IN over) (NP (NN time)))))))) (. .)))