snaps under the strain of its plot contrivances and its need to reassure 
(ROOT (S (VP (VBZ snaps) (PP (IN under) (NP (NP (NP (DT the) (NN strain)) (PP (IN of) (NP (PRP$ its) (NN plot) (NNS contrivances)))) (CC and) (NP (PRP$ its) (NN need) (S (VP (TO to) (VP (VB reassure))))))))))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (NN ) (NNS )))) (CC ) (NP (PRP$ ) (NN ) (S (VP (TO ) (VP (VB ))))))))))