255996
Since the cost and short supply of the rare earth elements boosts up the price of the high-performance hard magnet and the price of soft magnetic materials is relatively low , the exchange spring magnet may obtain great properties with low cost .
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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