, they 'll be treated to an impressive and highly entertaining celebration of its sounds . 
(ROOT (S (, ,) (NP (PRP they)) (VP (MD 'll) (VP (VB be) (VP (VBN treated) (PP (IN to) (NP (NP (DT an) (ADJP (ADJP (JJ impressive)) (CC and) (ADJP (RB highly) (JJ entertaining))) (NN celebration)) (PP (IN of) (NP (PRP$ its) (NNS sounds)))))))) (. .)))
(ROOT (S (, ) (NP (PRP )) (VP (MD ) (VP (VB ) (VP (VBN ) (PP (IN ) (NP (NP (DT ) (ADJP (ADJP (JJ )) (CC ) (ADJP (RB ) (JJ ))) (NN )) (PP (IN ) (NP (PRP$ ) (NNS )))))))) (. )))