Complex sentence: Benethusia is a theme or concept of a custom of sacrifice typically found within certain types of science fiction stories, however real examples of these customs have been recorded to exist among some indigenous people, such as certain Inuit tribes.
Split into simpler sentences: Benethusia is a theme or concept of a custom of sacrifice typically found within certain types of science fiction stories. However, real examples of these customs have been recorded to exist among some indigenous people, such as certain Inuit tribes.