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In 2 separate sessions , a single dose of scopolamine ( 0 . 5 mg , intravenously ) or placebo was administered , and the effects on word recall were measured using the Buschke Selective Reminding Test over 2 hours .
 Chemical: scopolamine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: scopolamine