29884
The first subgroup served as AD control ; the second one , which served as positive control , was treated orally with the conventional therapy for AD ( rivastigmine ) at a dose of 0 . 3 mg / kg body weight ( b . w . ) daily for 3 months .
 Chemical: rivastigmine
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: rivastigmine 
Answer:
 Chemical: rivastigmine