that , quite simply , should n't have been made 
(ROOT (S (NP (DT that)) (, ,) (ADVP (RB quite) (RB simply)) (, ,) (VP (MD should) (RB n't) (VP (VB have) (VP (VBN been) (VP (VBN made)))))))
(ROOT (S (NP (DT )) (, ) (ADVP (RB ) (RB )) (, ) (VP (MD ) (RB ) (VP (VB ) (VP (VBN ) (VP (VBN )))))))