( ( ( The ( ( most common ) type ) ) ( of ( breast cancer ) ) ) ( ( originates ( in ( epithelial cells ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (NN breast) (NN cancer)))) (VP (VBZ originates) (PP (IN in) (NP (JJ epithelial) (NNS cells)))) (. .)))
The most common type of breast cancer originates in epithelial cells.
(ROOT (S (NP (JJ Breast) (NN cancer)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (NP (NN cancer)) (PP (IN in) (NP (JJ adult) (NNS females))))))) (. .)))