( ( ( ( Quite simply ) , ) ( ( the idea ) ( that ( ( in ( fission cases ) ) ( there ( would ( be ( ( two persons ) ( in ( ( a ( single place ) ) ( at ( one time ) ) ) ) ) ) ) ) ) ) ) ) ( ( is preposterous ) . ) )
(ROOT (S (NP (NP (RB Quite) (RB simply)) (, ,) (NP (NP (DT the) (NN idea)) (SBAR (IN that) (S (PP (IN in) (NP (NN fission) (NNS cases))) (NP (EX there)) (VP (MD would) (VP (VB be) (NP (NP (CD two) (NNS persons)) (PP (IN in) (NP (NP (DT a) (JJ single) (NN place)) (PP (IN at) (NP (CD one) (NN time)))))))))))) (VP (VBZ is) (ADJP (JJ preposterous))) (. .)))
Quite simply, the idea that in fission cases there would be two persons in a single place at one time is preposterous.
(ROOT (S (NP (NNP Fission)) (VP (VBZ takes) (NP (NP (NN place)) (SBAR (WHADVP (WRB when)) (S (NP (DT an) (NN animal)) (ADVP (RB simply)) (VP (VBZ divides) (PP (IN into) (NP (CD two) (NNS parts)))))))) (. .)))