i don't know how what it would take to be come up with a true perfect system or if one exists but
( i ( ( do n't ) ( ( know how ) ( ( ( what ( it ( would ( take ( to ( be ( ( come up ) ( with ( a ( true ( perfect system ) ) ) ) ) ) ) ) ) ) ) or ) ( if ( one ( exists but ) ) ) ) ) ) )
(ROOT (S (NP (FW i)) (VP (VBP do) (RB n't) (VP (VB know) (NP (WRB how)) (SBAR (SBAR (WHNP (WP what)) (S (NP (PRP it)) (VP (MD would) (VP (VB take) (S (VP (TO to) (VP (VB be) (VP (VBN come) (PRT (RP up)) (PP (IN with) (NP (DT a) (JJ true) (JJ perfect) (NN system))))))))))) (CC or) (SBAR (IN if) (S (NP (PRP one)) (VP (VBZ exists) (ADVP (CC but))))))))))
A perfect solution may exist, but I don't know of it.
( ( ( ( ( ( A ( perfect solution ) ) ( may exist ) ) , ) but ) ( I ( ( do n't ) ( know ( of it ) ) ) ) ) . )
(ROOT (S (S (NP (DT A) (JJ perfect) (NN solution)) (VP (MD may) (VP (VB exist)))) (, ,) (CC but) (S (NP (PRP I)) (VP (VBP do) (RB n't) (VP (VB know) (PP (IN of) (NP (PRP it)))))) (. .)))