6587
Also there was no effect of Silexan on response rate , i . e . rate of lever pressing , at any dose suggesting that the test article is well tolerated and does not exert a sedating effect .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None