( ( In 1982 ) ( , ( they ( ( discovered ( ( ( the ( Lyme ( disease bacterium ) ) ) ( -LRB- ( i.e. ( , ( ( Borrelia burgdorferi ) -RRB- ) ) ) ) ) ( that ( causes ( Lyme disease ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (CD 1982))) (, ,) (NP (PRP they)) (VP (VBD discovered) (NP (NP (DT the) (NNP Lyme) (NN disease) (NN bacterium)) (PRN (-LRB- -LRB-) (FW i.e.) (, ,) (ADJP (RB Borrelia) (JJ burgdorferi)) (-RRB- -RRB-)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (JJ Lyme) (NN disease))))))) (. .)))
In 1982, they discovered the Lyme disease bacterium (i.e., Borrelia burgdorferi) that causes Lyme disease.
(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.