( ( The electron ) ( ( was ( the ( first ( subatomic ( particle ( to ( be discovered ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN electron)) (VP (VBD was) (NP (DT the) (JJ first) (JJ subatomic) (NN particle) (S (VP (TO to) (VP (VB be) (VP (VBN discovered))))))) (. .)))
The electron was the first subatomic particle to be discovered.
(ROOT (S (NP (DT A) (NN redox) (NN reaction)) (VP (VBZ rearranges) (NP (NP (DT the) (JJ subatomic) (NNS particles)) (VP (VBN known) (PP (IN as) (NP (NNS electrons)))))) (. .)))