jacobi , the most fluent of actors , 
(ROOT (NP (NP (NNP jacobi)) (, ,) (NP (NP (DT the) (ADJP (RBS most) (JJ fluent))) (PP (IN of) (NP (NNS actors)))) (, ,)))
(ROOT (NP (NP (NNP )) (, ) (NP (NP (DT ) (ADJP (RBS ) (JJ ))) (PP (IN ) (NP (NNS )))) (, )))