( ( ( A Pathologist ) ( -LRB- ( ( a ( doctor ( specializing ( in ( identifying disease ) ) ) ) ) -RRB- ) ) ) ( then ( ( ( studies ( the ( ( cells and ) tissues ) ) ) ( under ( a ( microscope ( to ( determine ( whether ( ( the tumor ) ( is cancerous ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT A) (NN Pathologist)) (PRN (-LRB- -LRB-) (NP (DT a) (NN doctor) (S (VP (VBG specializing) (PP (IN in) (S (VP (VBG identifying) (NP (NN disease)))))))) (-RRB- -RRB-))) (ADVP (RB then)) (VP (VBZ studies) (NP (DT the) (NNS cells) (CC and) (NNS tissues)) (PP (IN under) (NP (DT a) (NN microscope) (S (VP (TO to) (VP (VB determine) (SBAR (IN whether) (S (NP (DT the) (NN tumor)) (VP (VBZ is) (ADJP (JJ cancerous))))))))))) (. .)))
A Pathologist (a doctor specializing in identifying disease) then studies the cells and tissues under a microscope to determine whether the tumor is cancerous.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN pathologist)) (VP (VBZ specializes) (PP (IN in) (NP (NP (DT the) (NN laboratory) (NN detection)) (PP (IN of) (NP (NN disease)))))) (. .)))