18000
In summary , Ni - NTA - DG represents a promising ( delivery ) platform for forthcoming in vitro applications .
 Chemical: Ni - NTA - DG
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: Ni - NTA - DG