276073
Background An experimental Model E6 was developed in 1910 and , after two other " sample " locomotives and four years of tests , it was found that the 4-4-2 Atlantic 's speed equaled that of the larger 4-6-2 Pacific 's .
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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:  
Answer:
 None