50221
The book appeared under the Doubleday imprint in January 1950 with the title of " Pebble in the Sky " .
 organization: Doubleday
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: Doubleday 
Answer:
 organization: Doubleday