Question: Which county has the largest portion of this forest in which Glassy Mountain is located?
Sentence (from "Chattahoochee-Oconee National Forest"): The combined total area of the Chattahoochee-Oconee National Forest is 866468 acre , of which the Chattahoochee National Forest comprises 750145 acre and the Oconee National Forest comprises 116232 acre .
Relevant evidence: No