( Leukemia ( ( is ( ( the ( ( most common ) form ) ) ( of ( cancer ( in childhood ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Leukemia)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN form)) (PP (IN of) (NP (NP (NN cancer)) (PP (IN in) (NP (NN childhood))))))) (. .)))
Leukemia is the most common form of cancer in childhood.
(ROOT (S (NP (NNP Leukemia)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (NP (NN cancer)) (VP (VBN developed) (PP (IN in) (NP (NNS children)))))))) (. .)))