( ( d -RRB- ) ( Electrons ( ( are ( being ( transferred ( in ( a ( redox reaction ) ) ) ) ) ) . ) ) )
(ROOT (S (LST (LS d) (-RRB- -RRB-)) (NP (NNP Electrons)) (VP (VBP are) (VP (VBG being) (VP (VBN transferred) (PP (IN in) (NP (DT a) (NN redox) (NN reaction)))))) (. .)))
d) Electrons are being transferred in a redox reaction.
(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)))))) (. .)))