1279
Steam power Power for agricultural machinery was originally supplied by horses or other domesticated animal s. With the invention of steam power came the portable engine , and later the traction engine , a multipurpose , mobile energy source that was the ground-crawling cousin to the steam locomotive .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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