a lot of fun , with an undeniable energy sparked by two actresses in their 50s working at the peak of their powers . 
(ROOT (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NN fun))) (, ,) (PP (IN with) (NP (NP (DT an) (JJ undeniable) (NN energy)) (VP (VBN sparked) (PP (IN by) (NP (NP (NP (CD two) (NNS actresses)) (PP (IN in) (NP (PRP$ their) (NNS 50s)))) (VP (VBG working) (PP (IN at) (NP (NP (DT the) (NN peak)) (PP (IN of) (NP (PRP$ their) (NNS powers))))))))))) (. .)))
(ROOT (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN ))) (, ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (VP (VBN ) (PP (IN ) (NP (NP (NP (CD ) (NNS )) (PP (IN ) (NP (PRP$ ) (NNS )))) (VP (VBG ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (NNS ))))))))))) (. )))