too slow for a younger crowd , too shallow for an older one . 
(ROOT (ADJP (ADJP (RB too) (JJ slow) (PP (IN for) (NP (DT a) (JJR younger) (NN crowd)))) (, ,) (ADJP (RB too) (JJ shallow) (PP (IN for) (NP (DT an) (JJR older) (NN one)))) (. .)))
(ROOT (ADJP (ADJP (RB ) (JJ ) (PP (IN ) (NP (DT ) (JJR ) (NN )))) (, ) (ADJP (RB ) (JJ ) (PP (IN ) (NP (DT ) (JJR ) (NN )))) (. )))