( ( ( That exposure ) ( to ( ( solar ( ultraviolet-B ( ( -LRB- ( UVB -RRB- ) ) ( radiation increases ) ) ) ) ( ( the incidence ) ( of ( ( basal ( - ( and squamous-cell ) ) ) ( skin cancers ) ) ) ) ) ) ) ( ( is ( widely recognized ) ) . ) )
(ROOT (S (NP (NP (DT That) (NN exposure)) (PP (TO to) (NP (NP (JJ solar) (JJ ultraviolet-B) (PRN (-LRB- -LRB-) (NP (NN UVB)) (-RRB- -RRB-)) (NN radiation) (NNS increases)) (NP (NP (DT the) (NN incidence)) (PP (IN of) (NP (ADJP (JJ basal) (: -) (CC and) (JJ squamous-cell)) (NN skin) (NNS cancers))))))) (VP (VBZ is) (ADJP (RB widely) (VBN recognized))) (. .)))
That exposure to solar ultraviolet-B (UVB) radiation increases the incidence of basal- and squamous-cell skin cancers is widely recognized.
(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))))))) (. .)))