( ( Pathologist ( Doctor ( who ( specializes ( in ( ( ( examining tissue ) and ) ( diagnosing disease ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Pathologist) (NP (NP (NNP Doctor)) (SBAR (WHNP (WP who)) (S (VP (VBZ specializes) (PP (IN in) (S (VP (VP (VBG examining) (NP (NN tissue))) (CC and) (VP (VBG diagnosing) (NP (NN disease))))))))))) (. .)))
Pathologist Doctor who specializes in examining tissue and diagnosing disease.
(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)))))) (. .)))