( ( ( The nuclei ) ( of atoms ) ) ( ( are ( composed ( of ( ( ( ( ( protons , ) ( which ( have ( a ( positive ( electrical charge ) ) ) ) ) ) , ) and ) ( ( neutrons , ) ( which ( ( are electrically ) neutral ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN nuclei)) (PP (IN of) (NP (NNS atoms)))) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (NP (NNS protons)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (NP (DT a) (JJ positive) (JJ electrical) (NN charge)))))) (, ,) (CC and) (NP (NP (NNS neutrons)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral)))))))))) (. .)))
The nuclei of atoms are composed of protons, which have a positive electrical charge, and neutrons, which are electrically neutral.
(ROOT (S (NP (NNS Neutrons)) (VP (VBP are) (ADVP (RB electrically)) (ADJP (JJ neutral))) (. .)))