12049
This study suggested that SiO ( 2 ) NPs induce cytotoxicity and apoptosis in A431 and A549 cells , which is likely to be mediated through ROS generation and oxidative stress .
 Chemical: SiO ( 2 )
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: SiO ( 2 )