17531
Consequently , there is a significant interest in synthetic RBC analogues that can mimic its oxygen - transport properties while allowing convenient manufacture , reproducibility , long shelf life , and reduced biological risks .
 Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: oxygen