34218
A brain tumor composed of benign cells , but located in a vital area ( as the brain is ) , can be considered to be life-threatening — although the tumor and its cells would not be classified as malignant .
 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