16569
Originally identified as an innate cytotoxin , nitric oxide ( ( . ) NO ) formation in tumors can influence chemotherapy and exacerbate cancer progression .
 Chemical: nitric oxide; 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: nitric oxide, ( . ) NO 
Answer:
 Chemical: nitric oxide; Chemical: ( . ) NO