141968
From here the road descends into the Callejón de Huaylas , demarcated by the Cordillera Blanca to the east and the Cordillera Negra ( " Black Range " ) to the west .
 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