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In an effort to demonstrate the continued potential of steam , Bulleid pushed forward the boundaries of steam-power , allowing it to compete with diesel and electric locomotives in terms of labour-saving and ease of operation .
 person: Bulleid
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: Bulleid 
Answer:
 person: Bulleid