( There ( ( are ( ( six types ) ( of ( ( leptons , ) ( divided ( into ( three generations ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NP (NNS leptons)) (, ,) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS generations)))))))) (. .)))
There are six types of leptons, divided into three generations.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons))))) (. .)))