a pleasant and engaging enough sit , but 
(ROOT (S (NP (DT a) (ADJP (JJ pleasant) (CC and) (VBG engaging) (JJ enough)) (NN sit)) (, ,) (CC but)))
(ROOT (S (NP (DT ) (ADJP (JJ ) (CC ) (VBG ) (JJ )) (NN )) (, ) (CC )))