( ( ( ( ( ( Electrons , ) protons ) , ) and ) neutrons ) ( ( are ( ( the ( basic types ) ) ( of ( particles ( found ( in atoms ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Electrons)) (, ,) (NP (NNS protons)) (, ,) (CC and) (NP (NNS neutrons))) (VP (VBP are) (NP (NP (DT the) (JJ basic) (NNS types)) (PP (IN of) (NP (NP (NNS particles)) (VP (VBN found) (PP (IN in) (NP (NNS atoms)))))))) (. .)))
Electrons, protons, and neutrons are the basic types of particles found in atoms.
(ROOT (S (NP (DT A) (NN neutron)) (VP (VBZ collides) (PP (IN with) (NP (NP (DT an) (NN atom)) (PP (IN of) (NP (ADJP (JJ u-235) (PP (IN during) (NP (DT the) (JJ basic) (JJ nuclear) (NN fission)))) (NN process)))))) (. .)))
A neutron collides with an atom of u-235 during the basic nuclear fission process.