3808
These results suggested that KF17837 is a centrally active adenosine A2A receptor antagonist and that the dopaminergic function of the nigrostriatal pathway is potentiated by adenosine A2A receptor antagonists .
 Chemical: KF17837; Chemical: adenosine; Chemical: adenosine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: KF17837, adenosine, adenosine 
Answer:
 Chemical: KF17837; Chemical: adenosine; Chemical: adenosine