( ( ( ( ( ( The nucleus ) ( is ( composed ( of ( ( protons and ) neutrons ) ) ) ) ) , ) and ) ( ( individual ( ( protons and ) neutrons ) ) ( are ( composed ( of ( ( ( quarks and ) gluons ) ( which ( are ( bound ( inside ( ( these particles ) ( -LRB- ( ( also ( called hadrons ) ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN nucleus)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (NNS protons) (CC and) (NNS neutrons)))))) (, ,) (CC and) (S (NP (JJ individual) (NNS protons) (CC and) (NNS neutrons)) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (NNS quarks) (CC and) (NNS gluons)) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (VBN bound) (PP (IN inside) (NP (NP (DT these) (NNS particles)) (PRN (-LRB- -LRB-) (VP (ADVP (RB also)) (VBN called) (NP (NNS hadrons))) (-RRB- -RRB-))))))))))))) (. .)))
The nucleus is composed of protons and neutrons, and individual protons and neutrons are composed of quarks and gluons which are bound inside these particles (also called hadrons).
(ROOT (S (NP (NP (DT The) (CD two) (JJ main) (JJ fundamental) (NNS particles)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (NNS neutrons)))))) (VP (VBP are) (NP (NNS quarks) (CC and) (NNS gluons))) (. .)))