which imbue the theme with added depth and resonance 
(ROOT (SBAR (WHNP (WDT which)) (S (VP (VBP imbue) (NP (DT the) (NN theme)) (PP (IN with) (NP (VBN added) (NN depth) (CC and) (NN resonance)))))))
(ROOT (SBAR (WHNP (WDT )) (S (VP (VBP ) (NP (DT ) (NN )) (PP (IN ) (NP (VBN ) (NN ) (CC ) (NN )))))))