15556
By contrast in aortic rings , that exhibited negligible EDHF - type responses , endothelium - dependent NO - mediated relaxations evoked by CPA and ACh were unaffected by arsenite .
 Chemical: NO; Chemical: CPA; Chemical: ACh; Chemical: arsenite
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, CPA, ACh, arsenite 
Answer:
 Chemical: NO; Chemical: CPA; Chemical: ACh; Chemical: arsenite