as dumb , credulous , unassuming , subordinate subjects 
(ROOT (PP (IN as) (FRAG (ADJP (JJ dumb) (, ,) (JJ credulous) (, ,) (JJ unassuming) (, ,) (JJ subordinate) (NNS subjects)))))
(ROOT (PP (IN ) (FRAG (ADJP (JJ ) (, ) (JJ ) (, ) (JJ ) (, ) (JJ ) (NNS )))))