21349
Administration of 1 - azidoanthracene to albino stage 40 - 47 tadpoles was found to immobilize animals upon near - UV irradiation of the forebrain region .
 Chemical: 1 - azidoanthracene
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: 1 - azidoanthracene 
Answer:
 Chemical: 1 - azidoanthracene