( ( Sunlight Sunlight ) ( ( ( does not ) ( cause ( skin cancer ) ) ) . ) )
(ROOT (S (NP (NNP Sunlight) (NNP Sunlight)) (VP (VBZ does) (RB not) (VP (VB cause) (NP (NN skin) (NN cancer)))) (. .)))
Sunlight Sunlight does not cause skin cancer.
(ROOT (S (NP (NNP Sunlight)) (VP (VBZ is) (NP (NP (DT the) (VBG leading) (NN cause)) (PP (IN of) (NP (NN skin) (NN cancer))))) (. .)))