71374
His first , " The Voyevoda " , based on a play by Alexander Ostrovsky , premiered in 1869 .
 person: Alexander Ostrovsky
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: Alexander Ostrovsky 
Answer:
 person: Alexander Ostrovsky