( Some ( ( ( toxins ( cause cancers ) ) ( without ( causing ( ( gene mutations ) ( in ( the ( affected cells ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Some)) (VP (VBZ toxins) (NP (NN cause) (NNS cancers)) (PP (IN without) (S (VP (VBG causing) (NP (NP (NN gene) (NNS mutations)) (PP (IN in) (NP (DT the) (VBN affected) (NNS cells)))))))) (. .)))
Some toxins cause cancers without causing gene mutations in the affected cells.
(ROOT (S (NP (NP (NNS Mutations)) (PP (IN in) (NP (NP (JJ regulatory) (NNS genes)) (SBAR (WHNP (WDT that)) (S (ADVP (RB normally)) (VP (VBP control) (NP (DT the) (NN cell) (NN cycle)))))))) (VP (VBP cause) (NP (NN cancer))) (. .)))