, with increasingly amused irony , the relationship between reluctant captors and befuddled captives . 
(ROOT (S (, ,) (PP (IN with) (NP (ADJP (RB increasingly) (VBN amused)) (NN irony))) (, ,) (NP (NP (DT the) (NN relationship)) (PP (IN between) (NP (NP (JJ reluctant) (NNS captors)) (CC and) (NP (VBN befuddled) (NNS captives))))) (. .)))
(ROOT (S (, ) (PP (IN ) (NP (ADJP (RB ) (VBN )) (NN ))) (, ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (JJ ) (NNS )) (CC ) (NP (VBN ) (NNS ))))) (. )))