( Finally ( , ( ( groups ( of cells ) ) ( ( were ( ( formed ( in ( established cultures ) ) ) ( to ( test ( ( the possibility ) ( of ( ( introducing ( new cells ) ) ( to ( neurons ( with ( preexisting neurites ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Finally)) (, ,) (NP (NP (NNS groups)) (PP (IN of) (NP (NNS cells)))) (VP (VBD were) (VP (VBN formed) (PP (IN in) (NP (JJ established) (NNS cultures))) (S (VP (TO to) (VP (VB test) (NP (NP (DT the) (NN possibility)) (PP (IN of) (S (VP (VBG introducing) (NP (JJ new) (NNS cells)) (PP (TO to) (NP (NP (NNS neurons)) (PP (IN with) (NP (VBG preexisting) (NNS neurites)))))))))))))) (. .)))
Finally, groups of cells were formed in established cultures to test the possibility of introducing new cells to neurons with preexisting neurites.
(ROOT (S (NP (NNS Cells)) (VP (VBP come) (PP (IN from) (NP (VBG preexisting) (NNS cells)))) (. .)))