a joy to watch , even when her material is not first-rate 
(ROOT (NP (NP (NP (DT a) (NN joy)) (SBAR (S (VP (TO to) (VP (VB watch)))))) (, ,) (SBAR (ADVP (RB even) (WRB when)) (S (NP (PRP$ her) (NN material)) (VP (VBZ is) (RB not) (ADJP (JJ first) (HYPH -) (NN rate)))))))
(ROOT (NP (NP (NP (DT ) (NN )) (SBAR (S (VP (TO ) (VP (VB )))))) (, ) (SBAR (ADVP (RB ) (WRB )) (S (NP (PRP$ ) (NN )) (VP (VBZ ) (RB ) (ADJP (JJ ) (HYPH ) (NN )))))))