( Quarks ( ( are ( ( the ( elementary particles ) ) ( that ( form ( ( the ( ( protons and ) neutrons ) ) ( in ( atomic nuclei ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (NNS Quarks)) (VP (VBP are) (NP (NP (DT the) (JJ elementary) (NNS particles)) (SBAR (WHNP (WDT that)) (S (VP (VBP form) (NP (NP (DT the) (NNS protons) (CC and) (NNS neutrons)) (PP (IN in) (NP (JJ atomic) (NNS nuclei))))))))) (: ;)))
Quarks are the elementary particles that form the protons and neutrons in atomic nuclei;
(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))))))))))) (. .)))