15419
However , no genetic screening is advocated before commencement of allopurinol .
 Chemical: allopurinol
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: allopurinol 
Answer:
 Chemical: allopurinol