( ( Of ( ( 18 species ) ( compared ( to ( this rickettsia ) ) ) ) ) ( , ( ( the ( next ( ( most ( closely related ) ) bacterium ) ) ) ( ( was ( ( Legionella pneumophila ) ( at ( 86.7 % ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Of) (NP (NP (CD 18) (NNS species)) (PP (VBN compared) (PP (TO to) (NP (DT this) (NN rickettsia)))))) (, ,) (NP (DT the) (JJ next) (ADJP (RBS most) (RB closely) (JJ related)) (NN bacterium)) (VP (VBD was) (NP (NP (NNP Legionella) (NNP pneumophila)) (PP (IN at) (NP (CD 86.7) (NN %))))) (. .)))
Of 18 species compared to this rickettsia, the next most closely related bacterium was Legionella pneumophila at 86.7%.
(ROOT (S (NP (NNS Bacteria)) (VP (VBP are) (NP (NP (DT the) (RBS most) (JJ numerous) (NNS species)) (PP (IN on) (NP (DT the) (NN planet))))) (. .)))