100676
GTS-21 ( DMXB-A ) is a drug that acts as a partial agonist at neural nicotinic acetylcholine receptor s. It binds to both the α4β2 and α7 subtypes , but activates only the α7 to any significant extent .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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