( ( Particles ( such ( as ( ( protons and ) neutrons ) ) ) ) ( ( ( are actually ) ( ( made up ) ( of ( ( smaller ( fundamental components ) ) ( called ( quarks ( which ( ( can not ) ( exist ( on ( their own ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Particles)) (PP (JJ such) (IN as) (NP (NNS protons) (CC and) (NNS neutrons)))) (VP (VBP are) (ADVP (RB actually)) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NP (JJR smaller) (JJ fundamental) (NNS components)) (VP (VBN called) (NP (NP (NNS quarks)) (SBAR (WHNP (WDT which)) (S (VP (MD can) (RB not) (VP (VB exist) (PP (IN on) (NP (PRP$ their) (JJ own))))))))))))) (. .)))
Particles such as protons and neutrons are actually made up of smaller fundamental components called quarks which cannot exist on their own.
(ROOT (S (NP (NNS Protons) (CC and) (NNS neutrons)) (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NP (NNS quarks)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (NP (NP (JJ fundamental) (NNS particles)) (PP (IN of) (NP (NN matter))))))))))) (. .)))