1605
Mean follow - up on SRL therapy was 20 + / - 12 ( 6 to 43 ) months .
 Chemical: SRL
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: SRL 
Answer:
 Chemical: SRL