2609
Post - hoc t - tests revealed significant differences between placebo and ketamine for the amounts of words generated during lexical and semantic verbal fluency , while the phonological domain remained unaffected .
 Chemical: ketamine
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: ketamine