23637
An increased risk of ischemic stroke was associated with the use of risperidone ( aOR = 3 . 5 , 95 % CI 3 . 3 - 4 . 6 ) and quetiapine ( aOR = 2 . 7 , 95 % CI 2 . 0 - 3 . 6 ) during the 30 days prior to stroke : however , no significant risk was observed with olanzapine ( aOR = 1 . 2 , 95 % CI 0 . 7 - 2 . 0 ) .
 Chemical: risperidone; Chemical: quetiapine; Chemical: olanzapine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: risperidone; Chemical: quetiapine; Chemical: olanzapine