13284
In particular , TiN2 should crystallize in a new structure type , TiN2 - I .
 Chemical: TiN2; Chemical: TiN2
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: TiN2; Chemical: TiN2