( ( ( The ( spinning slits ) ) ( on ( the phenakistoscope ) ) ) ( , ( ( ( allow ( your ( ( eyes and ) brain ) ) ) ( to ( quickly ( see ( ( a series ) ( of ( ( still pictures ) ( of ( an animal ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (JJ spinning) (NNS slits)) (PP (IN on) (NP (DT the) (NN phenakistoscope)))) (, ,) (VP (VBP allow) (NP (PRP$ your) (NNS eyes) (CC and) (NN brain)) (S (VP (TO to) (VP (ADVP (RB quickly)) (VB see) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NP (JJ still) (NNS pictures)) (PP (IN of) (NP (DT an) (NN animal)))))))))) (. .)))
The spinning slits on the phenakistoscope, allow your eyes and brain to quickly see a series of still pictures of an animal.
(ROOT (S (NP (NNS Brain) (CC and) (NNS eyes)) (VP (VBP are) (S (NP (DT the) (NNS organs)) (VP (VB work) (PRT (RP together)) (S (VP (TO to) (VP (VB allow) (S (NP (PRP us)) (VP (TO to) (VP (VB see)))))))))) (. .)))