, the heart of the film rests in the relationship between sullivan and his son . 
(ROOT (S (, ,) (NP (NP (DT the) (NN heart)) (PP (IN of) (NP (DT the) (NN film)))) (VP (VBZ rests) (PP (IN in) (NP (NP (DT the) (NN relationship)) (PP (IN between) (NP (NP (NNP sullivan)) (CC and) (NP (PRP$ his) (NN son))))))) (. .)))
(ROOT (S (, ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (VP (VBZ ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (NNP )) (CC ) (NP (PRP$ ) (NN ))))))) (. )))