there is something such that it is not a Epidendrum.
sent1: the protactinium does not depose Bessel. sent2: The Bessel does not depose protactinium.
$hypothesis$ = there is something such that it is not a Epidendrum. ; $context$ = sent1: the protactinium does not depose Bessel. sent2: The Bessel does not depose protactinium. ; $proof$ = 
__UNKNOWN__