the rich performances by friel -- and especially williams , an american actress who becomes fully english -- 
(ROOT (NP (NP (NP (DT the) (JJ rich) (NNS performances)) (PP (IN by) (NP (NN friel)))) (, --) (CC and) (ADVP (RB especially)) (NP (NP (NNP williams)) (, ,) (NP (NP (DT an) (JJ american) (NN actress)) (SBAR (WHNP (WP who)) (S (VP (VBZ becomes) (ADJP (RB fully) (JJ english))))))) (: --)))
(ROOT (NP (NP (NP (DT ) (JJ ) (NNS )) (PP (IN ) (NP (NN )))) (, ) (CC ) (ADVP (RB )) (NP (NP (NNP )) (, ) (NP (NP (DT ) (JJ ) (NN )) (SBAR (WHNP (WP )) (S (VP (VBZ ) (ADJP (RB ) (JJ ))))))) (: )))