( ( ( Almost ( all cases ) ) ( of ( skin cancer ) ) ) ( ( can ( be ( ( traced ( to ( excessive exposure ) ) ) ( to ( ( ultraviolet ( ( -LRB- ( UV -RRB- ) ) radiation ) ) ( from ( the sun ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (RB Almost) (DT all) (NNS cases)) (PP (IN of) (NP (NN skin) (NN cancer)))) (VP (MD can) (VP (VB be) (VP (VBN traced) (PP (TO to) (NP (JJ excessive) (NN exposure))) (PP (TO to) (NP (NP (JJ ultraviolet) (PRN (-LRB- -LRB-) (NP (NNP UV)) (-RRB- -RRB-)) (NN radiation)) (PP (IN from) (NP (DT the) (NN sun)))))))) (. .)))
Almost all cases of skin cancer can be traced to excessive exposure to ultraviolet (UV) radiation from the sun.
(ROOT (S (NP (NP (NNP Exposure)) (PP (TO to) (NP (JJ ultraviolet) (NN radiation)))) (VP (MD can) (VP (VP (VB increase) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN pigment)))) (PP (IN in) (NP (DT the) (NN skin)))) (CC and) (VP (VB make) (S (NP (PRP it)) (VP (VB appear) (NP (JJR darker))))))) (. .)))