( Thus ( it ( ( ( ( is ( ( ( ( ( ( ( in ( a ( simple substance ) ) ) , ) and ) not ) ( in ( a compound ) ) ) or ) ( in ( a machine ) ) ) ) , ) ( that ( perception ( must ( be ( sought for ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Thus)) (NP (PRP it)) (VP (VBZ is) (PP (PP (IN in) (NP (DT a) (JJ simple) (NN substance))) (, ,) (CC and) (RB not) (PP (IN in) (NP (DT a) (NN compound))) (CC or) (PP (IN in) (NP (DT a) (NN machine)))) (, ,) (SBAR (IN that) (S (NP (NN perception)) (VP (MD must) (VP (VB be) (VP (VBN sought) (PP (IN for)))))))) (. .)))
Thus it is in a simple substance, and not in a compound or in a machine, that perception must be sought for.
(ROOT (S (NP (NNS Scissors)) (VP (VBP are) (NP (JJ compound) (NNS machines))) (. .)))