2556
Depression , impulsiveness , sleep , and memory in past and present polydrug users of 3 , 4 - methylenedioxymethamphetamine ( MDMA , ecstasy ) .
 Disease: Depression; Disease: impulsiveness; Chemical: 3 , 4 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: ecstasy
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:
 Disease: Depression; Disease: impulsiveness; Chemical: 3 , 4 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: ecstasy