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The first iron-cased and metal-cylinder rocket artillery were developed by Tipu Sultan and his father Hyder Ali , in the 1780 s .
 person: Tipu Sultan; person: Hyder Ali
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:
 person: Tipu Sultan; person: Hyder Ali