Complex sentence: Like many Northwest Coast natives, in pre-Colonial times the Quileute relied on fishing from local rivers and the Pacific Ocean for food and built plank houses (longhouses) to protect themselves from the harsh, wet winters west of the Cascade Mountains.
Split into simpler sentences: Like many Northwest Coast natives, in pre-colonial times the Quileute relied on fishing from local rivers and the Pacific Ocean for food. They built plank houses (longhouses) to protect themselves from the harsh, wet winters west of the Cascade Mountains.