Question: Which formation, Łebsko Lake or Coatepeque Caldera, is part of the Słowiński National Park?
Sentence (from "Lake Tōya"): Lake Tōya (洞爺湖 , Tōya-ko ) is a volcanic caldera lake in Shikotsu-Toya National Park, Abuta District, Hokkaidō, Japan.
Relevant evidence: No