( Radiation ( ( can ( ( damage organisms ) ( at ( ( ( a ( cellular ( level ( and ( cause cancer ) ) ) ) ) or ) ( genetic mutations ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Radiation)) (VP (MD can) (VP (VB damage) (NP (NNS organisms)) (PP (IN at) (NP (NP (DT a) (JJ cellular) (NN level) (CC and) (NN cause) (NN cancer)) (CC or) (NP (JJ genetic) (NNS mutations)))))) (. .)))
Radiation can damage organisms at a cellular level and cause cancer or genetic mutations.
(ROOT (S (NP (NNP Cancer)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (NNS mutations)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB be) (VP (VBN caused) (PP (IN by) (NP (NNS pathogens) (, ,) (NNS chemicals) (, ,) (CC or) (NN radiation)))))))))))) (. .)))