Complex sentence: Just before dying, he gave Jack a computer chip with information about the canisters, information which quickly led Jack to Henderson however it was rumored that the critiaclly injured Nathonson actually survived.
Split into simpler sentences: Just before dying, he gave Jack a computer chip with information about the canisters, information which quickly led Jack to Henderson. However it was rumored that the critiaclly injured Nathonson actually survived.