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Sultanate of Tidore ( Indonesian : Kesultanan Tidore , sometimes Kerajaan Tidore ) was a sultanate in Southeast Asia , centered on the Spice Islands of Tidore , a rival of Sultanate of Ternate for control of the spice trade .
 Tidore, Tidore, Tidore, Tidore
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tidore, Tidore, Tidore, Tidore