Um, I guess the time when I was four.
( Um ( , ( I ( ( guess ( ( the time ) ( when ( I ( was four ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Um)) (, ,) (NP (PRP I)) (VP (VBP guess) (NP (NP (DT the) (NN time)) (SBAR (WHADVP (WRB when)) (S (NP (PRP I)) (VP (VBD was) (NP (CD four))))))) (. .)))
When I was four I was happy.
( ( When ( I ( was four ) ) ) ( I ( ( was happy ) . ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP I)) (VP (VBD was) (NP (CD four))))) (NP (PRP I)) (VP (VBD was) (ADJP (JJ happy))) (. .)))