( ( ( ( ( The tick ) , ) ( Ixodes scapularis ) ) , ) ( ( can ( ( infect people ) ( with ( ( the bacterium ) ( responsible ( for ( causing ( Lyme disease ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN tick)) (, ,) (NP (NNP Ixodes) (NNS scapularis)) (, ,)) (VP (MD can) (VP (VB infect) (NP (NNS people)) (PP (IN with) (NP (NP (DT the) (NN bacterium)) (ADJP (JJ responsible) (PP (IN for) (S (VP (VBG causing) (NP (JJ Lyme) (NN disease)))))))))) (. .)))
The tick, Ixodes scapularis , can infect people with the bacterium responsible for causing 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.