13524
Sodium arsenite induces cyclooxygenase - 2 expression in human uroepithelial cells through MAPK pathway activation and reactive oxygen species induction .
 Chemical: Sodium arsenite; Chemical: oxygen
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: Sodium arsenite; Chemical: oxygen