( ( ( The ( three ( valence quarks ) ) ) ( in ( the proton ) ) ) ( ( ( ( ( include two ) ( up ( ( quarks and ) ( a ( down quark ) ) ) ) ) , ) ( while ( ( the ( neutron ( valence quarks ) ) ) ( include ( ( ( two downs ) and ) ( an up ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD three) (JJ valence) (NNS quarks)) (PP (IN in) (NP (DT the) (NN proton)))) (VP (VBP include) (NP (CD two)) (PP (IN up) (NP (NP (NNS quarks)) (CC and) (NP (DT a) (JJ down) (NN quark)))) (, ,) (SBAR (IN while) (S (NP (DT the) (NN neutron) (NN valence) (NNS quarks)) (VP (VBP include) (NP (NP (CD two) (NNS downs)) (CC and) (NP (DT an) (RB up))))))) (. .)))
The three valence quarks in the proton include two up quarks and a down quark, while the neutron valence quarks include two downs and an up.
(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))))) (. .)))