( ( ( The bacterium ) ( that ( causes ( Lyme Disease ) ) ) ) ( ( is ( named ( for ( ( ( ( the person ) ( who ( discovered it ) ) ) , ) ( ( ( Willy Burgdorfer ) , ) ( Ph.D. . ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN bacterium)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (NNP Lyme) (NNP Disease)))))) (VP (VBZ is) (VP (VBN named) (PP (IN for) (NP (NP (DT the) (NN person)) (SBAR (WHNP (WP who)) (S (VP (VBD discovered) (NP (PRP it))))) (, ,) (NP (NP (NNP Willy) (NNP Burgdorfer)) (, ,) (NP (NNP Ph.D.) (. .))))))) (. .)))
The bacterium that causes Lyme Disease is named for the person who discovered it, Willy Burgdorfer, Ph.D..
(ROOT (S (NP (JJ Lyme) (NN disease)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NNS bacteria))))) (. .)))
Lyme disease is caused by bacteria.