a long , dull procession of despair , set to cello music 
(ROOT (NP (NP (NP (DT a) (JJ long) (, ,) (JJ dull) (NN procession)) (PP (IN of) (NP (NN despair)))) (, ,) (VP (VBN set) (PP (IN to) (NP (NN cello) (NN music))))))
(ROOT (NP (NP (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (NN )))) (, ) (VP (VBN ) (PP (IN ) (NP (NN ) (NN ))))))