Complex sentence: The domestic pig is most often treated as a subspecies of its wild ancestor, the wild boar, which was given the name "Sus scrofa" by Carl Linnaeus in 1758, in which case its formal name is "Sus scrofa domesticus".
Split into simpler sentences: The domestic pig is most often treated as a subspecies of its wild ancestor, the wild boar, which was given the name "Sus scrofa" by Carl Linnaeus in 1758. In which case its formal name is "Sus scrofa domesticus".