238837
By the time these were delivered , the Northrop Corporation had been taken over by Douglas Aircraft Company , export models being known as the Douglas Model 8 .
 organization: Northrop Corporation; organization: Douglas Aircraft Company; organization: Douglas
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: Northrop Corporation, Douglas Aircraft Company, Douglas 
Answer:
 organization: Northrop Corporation; organization: Douglas Aircraft Company; organization: Douglas