2841
Beta - 2 - adrenoceptor - mediated hypokalemia and its abolishment by oxprenolol .
 Disease: hypokalemia; Chemical: oxprenolol
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: hypokalemia, oxprenolol 
Answer:
 Disease: hypokalemia; Chemical: oxprenolol