24503
Azidoacetylene is a highly explosive substance , which has been synthesized and characterized for the first time quite recently [ Banert et al . , Angew . Chem . , Int . Ed . , 2012 , 51 , 7515 ] .
 Chemical: Azidoacetylene
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: Azidoacetylene 
Answer:
 Chemical: Azidoacetylene