20767
Subsequent exploratory univariate ANOVAs on the N2 component revealed marginally significant between - group differences , generally showing greater negativity at occipito - parietal electrodes in ecstasy users compared to drug - na i ve controls .
 Chemical: ecstasy
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: ecstasy