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The clinical utility of dopamine ( DA ) D1 receptor agonists in the treatment of Parkinson ' s disease ( PD ) is still unclear .
 Chemical: dopamine; Chemical: DA; Disease: Parkinson ' s disease; Disease: PD
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:
 Chemical: dopamine; Chemical: DA; Disease: Parkinson ' s disease; Disease: PD