joy to watch and -- especially -- to listen to 
(ROOT (NP (NP (NP (VB joy)) (SBAR (S (VP (TO to) (VP (VB watch)))))) (CC and) (, --) (ADVP (RB especially)) (, --) (S (VP (TO to) (VP (VB listen) (PP (IN to)))))))
(ROOT (NP (NP (NP (VB )) (SBAR (S (VP (TO ) (VP (VB )))))) (CC ) (, ) (ADVP (RB )) (, ) (S (VP (TO ) (VP (VB ) (PP (IN )))))))