18742
These results suggest that the exogenous application of NO rendered the plants more tolerant to As - induced oxidative damage by enhancing their antioxidant defense and glyoxalase system .
 Chemical: NO; Chemical: As
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: NO, As 
Answer:
 Chemical: NO; Chemical: As