( ( Lyme disease ) ( ( is ( caused ( by ( ( a bacterium ) ( that ( is ( ( transmitted ( from ticks ) ) ( to ( warm-blooded animals ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Lyme) (NN disease)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (DT a) (NN bacterium)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN transmitted) (PP (IN from) (NP (NNS ticks))) (PP (TO to) (NP (JJ warm-blooded) (NNS animals))))))))))) (. .)))
Lyme disease is caused by a bacterium that is transmitted from ticks to warm-blooded animals.
(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.