After four years, Clinton has learned how to avoid looking unpresidential.
( ( After ( four years ) ) ( , ( Clinton ( ( has ( learned ( how ( to ( avoid ( looking unpresidential ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN After) (NP (CD four) (NNS years))) (, ,) (NP (NNP Clinton)) (VP (VBZ has) (VP (VBN learned) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB avoid) (S (VP (VBG looking) (NP (NN unpresidential)))))))))) (. .)))
After four torturous years, Clinton finally gets how to avoid unpresidential behavior.
( ( After ( four ( torturous years ) ) ) ( , ( Clinton ( finally ( ( gets ( how ( to ( avoid ( unpresidential behavior ) ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN After) (NP (CD four) (JJ torturous) (NNS years))) (, ,) (NP (NNP Clinton)) (ADVP (RB finally)) (VP (VBZ gets) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB avoid) (NP (JJ unpresidential) (NN behavior))))))) (. .)))