Complex sentence: Corcoran had set off into the wilderness in the dead of winter in an attempt to protect the local caribou population from poachers, however, the young ranger became lost and suffered severely from frostbite and starvation.
Split into simpler sentences: Corcoran had set off into the wilderness in the dead of winter in an attempt to protect the local caribou population from poachers. However, the young ranger became lost and suffered severely from frostbite and starvation.