3949
Perhaps , reporting for the first time , the association of TiO ( 2 ) NPs - induced genotoxicity and apoptosis at transcriptional and translational level in the human lung cancer cell line , A549 cells .
 Chemical: TiO ( 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: TiO ( 2 )