42212
With the expansion of railroad and industrial jobs in meatpacking , Omaha attracted many immigrants and migrants .
 location: Omaha
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: Omaha 
Answer:
 location: Omaha