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Over 12 months , we followed - up 75 schizophrenia patients who were classified into two groups according to antipsychotic treatment : clozapine or olanzapine ( group I ) versus aripiprazole or amisulpride ( group II ) .
 Chemical: clozapine; Chemical: olanzapine; Chemical: aripiprazole; Chemical: amisulpride
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: clozapine; Chemical: olanzapine; Chemical: aripiprazole; Chemical: amisulpride