context: After many attempts to expunge the three hostages, they are captured and sent to a dungeon, wherein Johnny finds Dr Edwards and John Bowman kidnapped by Ziska and his cronies.
source: Ziska had been a great surgeon who went mad and began to perform unorthodox operations.
reference_original: Ziska había sido un cirujano excelente que se volvió loco y empezó a realizar intervenciones quirúgicas poco convencionales.
reference_flipped: Ziska había sido una cirujana excelente que se volvió loca y empezó a realizar intervenciones quirúgicas poco convencionales.