Complex sentence: For the first six months of her captivity, Kampusch was not allowed to leave the chamber at any time, and for several years after her kidnapping she was not allowed to leave the tiny space at night.
Split into simpler sentences: For the first six months of her captivity, Kampusch was not allowed to leave the chamber at any time. And for several years after her kidnapping, she was not allowed to leave the tiny space at night.