15559
By contrast , selective increases in endothelial ROS production following exposure to arsenite failed to modify relaxations mediated by endogenous NO .
 Chemical: arsenite; Chemical: NO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: arsenite, NO 
Answer:
 Chemical: arsenite; Chemical: NO