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The brain GABA - benzodiazepine receptor alpha - 5 subtype in autism spectrum disorder : a pilot [ ( 11 ) C ] Ro15 - 4513 positron emission tomography study .
 Chemical: GABA; Chemical: benzodiazepine; Chemical: [ ( 11 ) C ] Ro15 - 4513
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: GABA, benzodiazepine, [ ( 11 ) C ] Ro15 - 4513 
Answer:
 Chemical: GABA; Chemical: benzodiazepine; Chemical: [ ( 11 ) C ] Ro15 - 4513