( Pathologists ( ( are ( physicians ( who ( ( specialize ( in ( ( the diagnosis ) ( of diseases ) ) ) ) ( through ( laboratory ( ( tests and ) examinations ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Pathologists)) (VP (VBP are) (NP (NP (NNS physicians)) (SBAR (WHNP (WP who)) (S (VP (VBP specialize) (PP (IN in) (NP (NP (DT the) (NN diagnosis)) (PP (IN of) (NP (NNS diseases))))) (PP (IN through) (NP (NN laboratory) (NNS tests) (CC and) (NNS examinations)))))))) (. .)))
Pathologists are physicians who specialize in the diagnosis of diseases through laboratory tests and examinations.
(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)))))) (. .)))