3558
Reactive oxygen species ( ROS ) production by the neutrophil NADPH oxidase plays a key role in host defense against pathogens , such as bacteria and fungi .
 Chemical: oxygen; Chemical: NADPH
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: oxygen, NADPH 
Answer:
 Chemical: oxygen; Chemical: NADPH