( ( Weak ( There ( are ( ( ( ( six kinds ) ( of quarks ) ) and ) ( ( six kinds ) ( of leptons ) ) ) ) ) ) . )
(ROOT (S (VP (VB Weak) (SBAR (S (NP (EX There)) (VP (VBP are) (NP (NP (NP (CD six) (NNS kinds)) (PP (IN of) (NP (NNS quarks)))) (CC and) (NP (NP (CD six) (NNS kinds)) (PP (IN of) (NP (NNS leptons))))))))) (. .)))
Weak There are six kinds of quarks and six kinds of leptons.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons))))) (. .)))