4799
Our results indicated that HTPB was a pan - HDAC inhibitor in suppressing cell viability specifically of lung cancer cells but not of the normal lung cells .
 cell, lung cancer cells, lung cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cell, lung cancer cells, lung cells