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In the " isospin picture " , the four Deltas and the two nucleons were thought to be the different states of two particles .
 location: Deltas
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: Deltas 
Answer:
 location: Deltas