Question: IN what national forest is a canyon system part of the Pottsville Escarpment located?
Sentence (from "Furnace Mountain"): Furnace Mountain (temple name Kwan Se Um San Ji Sah) is an American Zen Buddhist retreat center in Clay City, Kentucky, co-founded in 1986 by Seung Sahn Soen Sa Nim and Dae Gak Soen Sa Nim as part of the international Kwan Um School of Zen; it is now unaffiliated with the school in an official capacity.
Relevant evidence: No