20177
We conclude that ZnO - np leads to cell death through autophagic vacuole accumulation and mitochondria damage in normal skin cells via ROS induction .
 Chemical: ZnO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ZnO