authentically vague , but ultimately purposeless , 
(ROOT (ADJP (ADJP (RB authentically) (JJ vague)) (, ,) (CC but) (ADJP (RB ultimately) (JJ purposeless)) (, ,)))
(ROOT (ADJP (ADJP (RB ) (JJ )) (, ) (CC ) (ADJP (RB ) (JJ )) (, )))