( ( fewer ( than half ) ) ( ( knew ( that ( electrons ( are ( subatomic particles ) ) ) ) ) . ) )
(ROOT (S (NP (QP (JJR fewer) (IN than) (PDT half))) (VP (VBD knew) (SBAR (IN that) (S (NP (NNS electrons)) (VP (VBP are) (NP (JJ subatomic) (NNS particles)))))) (. .)))
fewer than half knew that electrons are subatomic particles.
(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)))))) (. .)))