( ( ( Repeated exposure ) ( to ( ultraviolet radiation ) ) ) ( ( ( ( increases ( ( the risk ) ( of ( skin cancer ) ) ) ) , ) ( especially ( if ( you ( ( ( have ( fair skin ) ) or ) ( freckle easily ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Repeated) (NN exposure)) (PP (TO to) (NP (JJ ultraviolet) (NN radiation)))) (VP (VBZ increases) (NP (NP (DT the) (NN risk)) (PP (IN of) (NP (NN skin) (NN cancer)))) (, ,) (SBAR (RB especially) (IN if) (S (NP (PRP you)) (VP (VP (VBP have) (NP (JJ fair) (NN skin))) (CC or) (VP (VBP freckle) (ADVP (RB easily))))))) (. .)))
Repeated exposure to ultraviolet radiation increases the risk of skin cancer, especially if you have fair skin or freckle easily.
(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))))))) (. .)))