( ( ( The ( only example ) ) ( of ( ( a cell ) ( with ( ( a flagellum ) ( in ( the ( human body ) ) ) ) ) ) ) ) ( ( is ( the ( sperm cell ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ only) (NN example)) (PP (IN of) (NP (NP (DT a) (NN cell)) (PP (IN with) (NP (NP (DT a) (NN flagellum)) (PP (IN in) (NP (DT the) (JJ human) (NN body)))))))) (VP (VBZ is) (NP (DT the) (NN sperm) (NN cell))) (. .)))
The only example of a cell with a flagellum in the human body is the sperm cell.
(ROOT (S (PP (IN In) (NP (NNS humans))) (, ,) (NP (DT the) (NN sperm) (NN cell)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN cell)) (PP (IN with) (NP (DT the) (NN flagella) (NN structure))) (SBAR (WHNP (WDT that)) (S (VP (VBZ enables) (ADVP (RB motility))))))) (. .)))