( ( Each ( ( proton or ) neutron ) ) ( ( incorporates ( three quarks ) ) . ) )
(ROOT (S (NP (DT Each) (NN proton) (CC or) (NN neutron)) (VP (VBZ incorporates) (NP (CD three) (NNS quarks))) (. .)))
Each proton or neutron incorporates three quarks.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD three) (NNS quarks)) (PP (IN in) (NP (DT each) (NN proton) (CC and) (NN neutron))))) (. .)))