303824
On top of the oreum , there is a shallow crater lake in which the level of water changes by the seasons and this water is just from rainfalls due to the topographical features of Mulyeongari-oreum .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None