78154
Railroads employ snow sheds - structures that cover the track - to prevent the accumulation of heavy snow or avalanches to cover tracks in snowy mountainous areas , such as the Alps and the Rocky Mountains .
 Alps, Rocky Mountains
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alps, Rocky Mountains