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As one of the most powerful surface combatants within the ROCN , Ping Hai was subjected to aerial attacks by the Imperial Japanese Navy since the Battle of Shanghai , but it was not until September 23 , during the Japanese assault on the Kiangyin Fortress ( which guarded the segment of Yangtze River near Nanking ) , for Ping Hai to finally succumb with its sistership to airstrikes launched from both carrier Kaga and airfields around occupied Shanghai .
 organization: Imperial
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: Imperial 
Answer:
 organization: Imperial